Hel

Weapon: Hel's Reaper

Assist: Reposition

Special: Noontime / Moonbow

Passive A: Distant Counter / Bracing Stance

Passive B: Guard Bearing / Mystic Boost

Passive C: Inevitable Death

Sacred Seal: Fierce Stance / Swift Sparrow

• Why try to improve on perfection? Hel comes pre-built with what is basically all of her best-in-slot options for being an incredible generalist monster.
• The only significant change here is Noontime over her native Luna, which serves to heal Hel back up after she has been hit once. This is important because if her Miracle effect procs, she will heal back to above 1 HP and be ready to proc it again in the next fight, essentially rendering her unkillable in a single combat, so long as her opponent does not double her - which would be very difficult with her statline and the debuffs from Inevitable Death.
• You can also be particularly sadistic and sacrifice an Eir for Mystic Boost in Hel's B slot, which heals her after every combat. This allows her to run Moonbow as her Special and prevents her healing from being countered by an opponent's Guard effect.
• Bracing Stance is an option to make Hel significantly harder to kill, but requires a high sacrifice and removes Hel's ability to counter at a distance - which she is particularly skilled at, due to her weapon's built-in Iote's Shield.
• For a sacred seal, it really depends on what you'd like her to do. For a more offensive build, Sacred Sparrow does the trick - otherwise, Fierce Stance gives Hel additional Attack, which can make all the difference in defensive combat.

Weapon: Hel's Reaper

Assist: Rally Atk/Def+ / Rally Attack

Special: Galeforce

Passive A: Sturdy Impact / Atk/Spd Solo / Heavy Blade

Passive B: Lunge

Passive C: Inevitable Death

Sacred Seal: Heavy Blade / Hardy Bearing

• This set takes advantage of Hel's incredible Speed and Attack, as well as her Reaper's Slaying and Miracle effect, in order to become a frontline powerhouse in Aether Raids Defense.
• With this set, she becomes somewhat of a mixture between Seliph, who is very difficult to kill, and Eliwood, who threatens many teams with his easy Galeforce activation. While she is not quite as good at this role as either of them (due to being a Mythic, her HP pool will be much lower than a blessed Seliph and she lacks Eliwood's guaranteed Special acceleration), combining both aspects of these frontliners is sure to frustrate enemy players.
• Giving Hel a Rally skill helps to make her more unpredictable, particularly when paired with a dancer such as Legendary Azura, who can refresh Hel and grant her additional movement to attack unsuspecting player units.
• With Sturdy Impact, Hel shuts down any form of followup attack, such as Quick Riposte or Vengeful Fighter. This means that her Miracle effect will activate if attacking a physical unit, preventing her from being defeated on her opponent's only retaliation.
• Then, the fun begins. With Heavy Blade in her seal slot and her impressive Attack - bolstered by Sturdy Impact and Inevitable Death - Hel can activate Galeforce and then refresh her turn. At this point, Lunge exchanges her place with the enemy tank and allow her access to the rival player's backline.
• This also gives her tremendous synergy with allies who have Wings of Mercy in their B slot: with Hel guaranteed to survive with 1 HP or more, her allies can teleport to her and continue battering the enemy team.