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Table of Contents

Tier Rating

Analysis by Lunare
Petra - Princess of Brigid

5

Obtainable as a 5 only

Hero Stats

Max Avg Total Stats at Lvl 40
155
HP 40
ATK 32
SPD 38
DEF 25
RES 20

Stat Variations

Level 1 Stat Variation
5★
HP ATK SPD DEF RES
Low 17 5 9 5 4
Middle 18 6 10 6 5
High 19 7 11 7 6

Level 40 Stat Variations
5★
HP ATK SPD DEF RES
Low 36 29 35 22 17
Middle 40 32 38 25 20
High 43 35 41 29 23

IV Sets

Key stats worth increasing through nature if possible.
Complementary stats that matter, but not to the point of picking them over key stats for nature increase.
Relatively worthless stat that can safely be decreased through nature.
HPATKSPDDEFRES

Assets

  • +ATK: Petra greatly appreciates the bonus Attack offered by this Asset. The extra points place her at a base value of 35, which is a respectable figure without causing difficulty in improving this stat with Hunting Blade.
  • +SPD: A Speed Asset is less vital than a +ATK Asset, but Petra can use the bonus Speed if she’s unlikely to receive a +5 bonus from Hunting Blade. With 41 base Speed before skills and buffs, Petra should have no issue performing follow-up attacks.

Neutral

  • HP: As Petra cannot improve her HP through Hunting Blade unlike the rest of her stats, her base 40 HP stat should be preserved as much as possible. In addition, a 4-point Flaw makes this much less favourable compared to other Flaws..
  • RES: Petra’s poor base Resistance of 20 isn’t as bad as it may appear, as she can easily receive the +5 bonus from Hunting Blade as a result. With that said, a value of 25 is still rather unimpressive, so Resistance should be preserved when possible.

Flaws

  • -DEF: A -DEF Flaw places Petra’s defense at 22, allowing her to more easily offset this penalty through the bonus offered by Hunting Blade. A -DEF Flaw allows for greater mixed bulk than a Resistance Flaw would permit, overall improving her durability.

Skill Sets

Brigid Pride (Offensive/Utility Hybrid)

Recommended
Hunting Blade A Atk/Spd Form 3
Reposition B Aerobatics 3
Alternate: Desperation 3
Luna
Alternate: Moonbow
C Guidance 3
Alternate: Ground Orders 3
SP1265SAtk/Spd Bond 3
Alternate: Guidance 3

Show Explanation/Analysis

Preferred IV: +ATK / -DEF

  • +ATK is Petra’s ideal Asset to maximise her damage output. +SPD is a passable alternative, but hinders the likelihood of any bonus Speed from Hunting Blade. -DEF is Petra’s ideal Asset to balance her mixed bulk.

Weapon: Hunting Blade

  • The Hunting Blade can offer an impressive +5 bonus to all of Petra’s combat stats if any allies within 2 spaces have a higher value in each corresponding stat. Finding complementary allies for Petra and keeping them nearby is essential to maximise her combat effectiveness. Special acceleration and a Dagger 7 effect are the additional advantages.

Assist: Reposition / Flexible

  • Reposition allows Petra to bring allies further into the frontline, ensuring that they remain within 2 spaces of her during her next round of combat. This complements Hunting Blade nicely in ensuring Petra has nearby allies, but the Assist skill can be changed to suit the needs of the team.

Special: Luna / Moonbow

  • Luna is present in Petra’s base kit and provides a great damage bonus against opponents with high Defense. Luna is an appealing choice thanks to Petra’s innate Special acceleration from Hunting Blade, and her base stats do not suit other alternatives such as Draconic Aura.
  • Moonbow is a decent alternative, offering less damage in exchange for a shorter cooldown. Though this Special can occur more often, Petra’s Special acceleration makes skills with longer cooldowns more worthwhile.

Passive A: Atk/Spd Form / Swift Sparrow

  • Petra’s base A slot skill, Atk/Spd Form, is an impressive offensive tool that can provide a bonus of up to +7 to Attack and Speed provided Petra has three nearby allies. The additional advantage of this skill is that these bonuses persist during Enemy Phase, allowing Petra to potentially avoid enemy follow-up Attacks thanks to the additional Speed.
  • Swift Sparrow offers stellar bonuses to both Attack and Speed that will greatly improve upon Petra’s decent offensive stats during Player Phase. Swift Sparrow 3 can offer comparable bonuses to Atk/Spd Form without the requirement of three nearby allies, though this skill is less appealing if you’re limited to Swift Sparrow 2.

Passive B: Aerobatics / Flier Formation / Chill Def / Desperation

  • Aerobatics improves Petra’s mobility and allows her to benefit from Hunting Blade more easily by placing Petra alongside allies. This skill works particularly well in Aether Raids, where the additional allied hero can offer another target for Petra to move to.
  • Flier Formation is a similar alternative to Aerobatics that will prove more effective in teams of exclusively flying heroes.
  • Chill Def is a more offensive choice. Debuffing enemy heroes can provide up to 14 bonus damage for Petra if she can make a follow-up attack against the chilled target, potentially creating KO opportunities against bulky heroes that would otherwise resist her attacks. 
  • If Aerobatics or Flier Formation are taken in the Seal slot, Desperation is a cheap, readily available option that can provide offensive utility by safeguarding Petra from enemy retaliation.

Passive C: Guidance / Ground Orders / Even Attack Wave / Flexible

  • Guidance is another mobility skill worth considering, as this allows allies to move adjacent to Petra specifically. This proves a greater benefit in finding suitable allies for Hunting Blade buffs, and complements Bond skills that can be taken in the S slot.
  • Ground Orders is available in Petra’s base kit and serves a similar function to Aerobatics: this skill improves the mobility of her allies in order to bring them closer to Petra and activate the requirements of the Hunting Blade.
  • Even Attack Waves provides a great +6 bonus to Petra’s Attack stat, improving her damage output without the need for buffs from allies. This can be a valuable combat buff, but ideally Petra can gain this bonus from an ally.

Sacred Seal: Atk/Spd Bond / Brazen Atk/Res / Guidance / Attack +3

  • With Guidance, Petra can easily activate the requirement for Atk/Spd Bond while also bringing an ally in range for Hunting Blade. Other Bond skills such as Atk/Def Bond or Atk/Res Bond may prove more effective if Petra has excess Speed.
  • Alternatively, other Attack boosting skills such as Brazen Atk/Res or even Attack +3 can be passable alternatives. Boosting Petra’s Attack will ensure she can achieve a wider range of KOs.
  • If Guidance isn’t taken in the C slot, this is another opportunity to use the skill. Guidance greatly improves Petra’s ability to bring allies nearby for Hunting Blade activation, making it a valuable offensive and defensive skill in addition to the mobility.

Hunter Princess (Standard Offensive)

Hunting Blade A Brazen Atk/Spd 4
Alternate: Atk/Spd Form 3
Reciprocal Aid B Desperation 3
Alternate: Aerobatics 3
Luna
Alternate: Moonbow
C Odd Atk Wave 3
Alternate: Guidance 3
SP1535SBrazen Atk/Spd 3
Alternate: Guidance 3

Show Explanation/Analysis

Preferred IV: +ATK / -DEF

  • +ATK is Petra’s ideal Asset to maximise her damage output. +SPD is a passable alternative, but hinders the likelihood of any bonus Speed from Hunting Blade. -DEF is Petra’s ideal Asset to balance her mixed bulk.

Weapon: Hunting Blade

  • The Hunting Blade can offer an impressive +5 bonus to all of Petra’s combat stats if any allies within 2 spaces have a higher value in each corresponding stat. Finding complementary allies for Petra and keeping them nearby is essential to maximise her combat effectiveness. Special acceleration and a Dagger 7 effect are the additional advantages.

Assist: Reciprocal Aid / Reposition / Flexible

  • Reciprocal Aid allows Petra to reach the necessary HP threshold for her skills more easily, making it a worthy choice for her Assist skill if she has an Enemy Phase oriented ally to target.
  • Alternatively, Reposition allows Petra to bring allies further into the frontline, ensuring that they remain within 2 spaces of her during her next round of combat. This complements Hunting Blade nicely in ensuring Petra has nearby allies, but the Assist skill can be changed to suit the needs of the team.

Special: Luna / Moonbow

  • Luna is present in Petra’s base kit and provides a great damage bonus against opponents with high Defense. Luna is an appealing choice thanks to Petra’s innate Special acceleration from Hunting Blade, and her base stats do not suit other alternatives such as Draconic Aura.
  • Moonbow is a decent alternative, offering less damage in exchange for a shorter cooldown. Though this Special can occur more often, Petra’s Special acceleration makes skills with longer cooldowns more worthwhile.

Passive A: Brazen Atk/Spd / Atk/Spd Form / Swift Sparrow

  • Brazen Atk/Spd provides a strong bonus to Petra’s most essential stats, while synergising well with Desperation. Brazen Atk/Spd 4 can offer a tremendous bonus to Petra’s stats, though Brazen Atk/Spd 3 is a more accessible and readily available skill.
  • Atk/Spd Form, though more difficult to activate without any of the plethora of mobility skills, can still be used to provide a strong bonus to Attack and Speed. This skill is also more readily available than the alternatives.
  • With no mobility skills to keep Petra’s allies close by, it’s worth considering Swift Sparrow over Atk/Spd Form. Swift Sparrow 3 is ideal to offer comparable bonuses, but if this is unavailable, other options should be considered.

Passive B: Desperation / Chill Def / Aerobatics

  • Desperation protects Petra from enemy retaliation once she reaches the necessary threshold, and complements Brazen skills exceptionally well. Furthermore, this skill is very accessible without the need for expensive inheritance.
  • Chill Def is a more premium choice that will improve Petra’s damage output at the cost of her survivability against heroes who can retaliate. However, if Petra can target her chilled opponent she can deal a significant amount of bonus damage.
  • Aerobatics is a budget choice for those unwilling to part with Petra’s mobility. Though it has no direct impact on her offensive role, Aerobatics can improve Petra’s ease of use and synergises well with Hunting Blade.

Passive C: Odd Attack Wave / Guidance / Flexible

  • Odd Attack Wave or Even Attack Wave provide a bonus to Petra’s Attack stat, which can have a great impact on her offensive prowess if Petra has no other sources of this buff.
  • Guidance is a worthy consideration to ensure uptime of Hunting Blade’s bonuses. Furthermore, Guidance can synergise well with other aggressive, offensive units who can benefit from the extra mobility.

Sacred Seal: Brazen Atk/Spd / Atk/Spd Bond / Guidance

  • Brazen Atk/Spd improves Petra’s offensive role further by providing an even greater bonus to her two key stats. Brazen Atk/Def or Brazen Atk/Res are possible alternatives, but with Desperation these skills are of little to no benefit.
  • Atk/Spd Bond is worth considering if Guidance is opted for in Petra’s C slot, as this skill makes it much easier to position an ally adjacent to Petra. However, this bonus is only relevant before Petra reaches the threshold for Brazen skills, at which point the bonus is inferior to Brazen Atk/Spd.
  • Guidance can be a respectable pick-up in the S slot instead if other options are less desired, as this skill ensures benefits from Hunting Blade.

Introduction

Petra is an offensive focused blue dagger flier with a powerful PRF weapon and a unique playstyle. Petra’s blue coloration and her middling Attack stat of 32 present a poor image at first glance, but with a complementary team composition and build, Petra can achieve fantastic bonus stats from her weapon and serve as a powerful high Speed unit.

Hunting Blade is Petra’s key asset: this dagger has numerous effects, including Special acceleration, a -7 dagger debuff and a unique buffing mechanic. Petra will gain +5 to any of her combat stats in an ally within 2 spaces has a higher value, promoting a team-focused playstyle that keeps Petra close to her allies. Petra can achieve multiple +5 buffs from a single ally, 

This dagger is fantastic, but the rest of Petra’s kit is relatively unremarkable. Her stats leave a lot to be desired, as beyond her base 38 Speed she has rather mediocre base values. Blue coloration places Petra in the weapon triangle, though she’d be a much more versatile unit if she were colourless. Overall, though she has her shortcomings, careful play and a suitable team composition to support Hunting Blade can sculpt Petra into a respectable offensive hero.

"I hope, for a future, where the Empire, and Brigid, could cooperate."

Petra - Fire Emblem: Three Houses

Strengths

Good Offensive Stats

With an offensive spread of 32/38 in Attack and Speed, Petra can reliably make follow-up attacks against a range of heroes with low or middling Speed. These values can be improved further through skills, buffs and Hunting Blade, offering Petra a high potential ceiling.

Hunting Blade

Hunting Blade sets Petra apart from other similar heroes. If suitable allies are in range, Petra can receive a +5 to all of her combat stats, elevating her stats before other skills to a much more formidable 37/43/30/25 in Atk/Spd/Def/Res.

Flier Mobility

Petra’s flier classification allows her to traverse terrain that impedes or blocks other heroes. This improves her effective range on relevant maps and makes it easier to position her for Player Phase attacks.

Weaknesses

Mediocre Stats

Petra’s stats before accounting for Hunting Blade are relatively poor. Though it is rare that Petra will fight without benefitting from any of these bonuses during proper play, her performance in these situations is greatly hampered.

Blue Coloration

Petra’s role as a blue dagger improves her effectiveness against red heroes, but this trade-off is not worth the impact to her green match-ups. Petra would generally prefer to be a colourless hero to avoid this penalty.

Weakness to Flier Effectiveness

As a flying hero, Petra is susceptible to OHKO from enemy archers, especially given her somewhat poor Defense stat. Petra must be wary of all enemy archers in order to avoid lethal attacks.

Weapon Skills

Weapons SP Rng. Mt.
Iron DaggerAfter combat, inflicts Def/Res-3 on foe through its next action.
Learns by default at 1 ★
Unlocks at 1 ★
Dagger users only.
50 2 3
Steel DaggerAfter combat, inflicts Def/Res-3 on foe through its next action.
Learns by default at 3 ★
Unlocks at 2 ★
Dagger users only.
100 2 5
Silver DaggerAfter battle, inflicts Def/Res-5 on foe through its next action.
Learns by default at 4 ★
Unlocks at 3 ★
Dagger users only.
200 2 7
Hunting BladeAccelerates Special trigger (cooldown count-1). Effective against beast foes. At start of combat, if unit's Atk/Spd/Def/Res < that of an ally within 2 spaces, grants +5 to unit's corresponding stat during combat. Calculates each stat bonus independently. Effect:【Dagger 7】 【Dagger 7】 After combat, if unit attacked, inflicts Def/Res-7 on target and foes within 2 spaces of target through their next actions.
Learns by default at 5 ★
Unlocks at 5 ★
Non-Inheritable skill.
400 2 14
Weapon Evolution
Weapon Upgrades
Weapon Upgrades

Special Skills

Special Skills SP Turns
New MoonResolve combat as if foe suffered Def/Res-30%
Learns by default at 4 ★
Unlocks at 3 ★
Non-inheritable by Staff-wielding units.
100 3
LunaResolve combat as if foe suffered Def/Res-50%
Unlocks at 4 ★
Non-inheritable by Staff-wielding units.
200 3

Passive Skills

Passive Skills SP Slot
Atk/Spd Form 1Atk/Spd+X to unit during combat. (X = number of allies within 2 spaces; max 3.)
Inheritable by all units.
Unlocks at 3 ★
60
A
Atk/Spd Form 2Grants Atk/Spd+X to unit during combat. (X = number of allies within 2 spaces + 2; max 5.)
Inheritable by all units.
Unlocks at 4 ★
120
A
Atk/Spd Form 3Grants Atk/Spd+X to unit during combat. (X = 2 x number of allies within 2 spaces, + 1; max 7.)
Unlocks at 5 ★
240
A
Aerobatics 1If unit's HP = 100%, unit can move to a space adjacent to any infantry, armored, or cavalry ally within 2 spaces.
Unlocks at 1 ★
60
B
Aerobatics 2If unit's HP ≥ 50%, unit can move to a space adjacent to any infantry, armored, or cavalry ally within 2 spaces.
Unlocks at 2 ★
120
B
Aerobatics 3Unit can move to a space adjacent to any infantry, armored, or cavalry ally within 2 spaces.
Unlocks at 4 ★
240
B
Ground Orders 1At start of turn, if unit's HP = 100% grants the following status to adjacent infantry, armored, and cavalry allies for 1 turn: "Unit can move to a space adjacent to any ally within 2 spaces".
Flying Only
Unlocks at 3 ★
60
C
Ground Orders 2At start of turn, if unit's HP ≥ 50%, grants the following status to adjacent infantry, armored, and cavalry allies for 1 turn: "Unit can move to a space adjacent to any ally within 2 spaces".
Flying Only
Unlocks at 4 ★
120
C
Ground Orders 3At start of turn, grants the following status to adjacent infantry, armored, and cavalry allies for 1 turn: "Unit can move to a space adjacent to any ally within 2 spaces".
Flying Only
Unlocks at 5 ★
240
C

Other Info

Origin
Fire Emblem: Three Houses

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