Gharnef

Weapon: Imhullu (+Eff)

Assist: Positional Assist / Fflexible

Special: Moonbow / Glimmer 

IVs: +Atk or +Spd / -Def or -Res

Passive A: Sturdy Impact / Mirror Impact / Flexible

Passive B: Null Follow-Up / Lull Atk/Res / Flexible

Passive C: Fatal Smoke / Pulse Smoke / Flexible

Sacred Seal: Blade Session / Flexible

• Imhullu’s ability to deny counterattacks, both as a status applied at the start of turn 3 and in any combat against foes that do not wield tomes, can make Gharnef a threatening unit. The 30% damage reduction also allows him to survive a counterattack somewhat more reliably. The other skills here are chosen to improve his ability to survive combat with various units, as well as apply annoying status effects such as Fatal Smoke to prevent tanks from healing or Pulse Smoke to slow their Specials. 
• The choice of boon is flexible, with +Atk being useful to improve Gharnef’s damage and +Spd for improving his ability to follow-up and deny follow-ups. 
• The A skill is flexible, with Sturdy Impact and Mirror Impact being solid choices. Sturdy Impact is best against foes like Ascended Fjorm or other physical units using Null C-Disrupt. Mirror Impact is better against tomes. In both cases, denying an enemy follow-up can allow Gharnef to survive the combat much more reliably. Other skills like any Atk/Spd Boosting A Slot can also work. 
• Null Follow-Up is a great B skill that disables any effects that prevent Gharnef’s follow-up attack or guarantee his foe a follow-up attack. This can allow him to both get an extra attack and deny one of his foe’s attacks. Lull Atk/Res is also a good choice to decrease his foe’s Atk and Res, allowing him to deal more damage and take less. 
• The seal is flexible. Blade Session provides a large potential power boost, up to +9 Atk and Spd if two allies have ended their turns before Gharnef. Other options like Swift Sparrow and Sturdy Blow are also good choices. 

Weapon: Imhullu (+Eff)

Assist: Positional Assist / flexible

Special: Flexible

IVs: +Atk or +HP or +Res / -Def

Passive A: R Duel Infantry 4 / HP +5 / Fortress Res / Flexible

Passive B: Sudden Panic / Sabotage Atk / Flexible

Passive C: Infantry Pulse / Inf. Hexblade / Flexible

Sacred Seal: HP +5 / Distant Guard / Drive Atk / Flexible

• Imhullu’s turn 3 Flash and out-of-combat damage can also be a valuable support effect in some modes like Arena. This build aims to capitalize on that by including other useful support effects. 
• Gharnef has many options available for support skills. Sudden Panic or Panic Ploy can be used to Panic enemies. Infantry Pulse or Inf. Hexblade can grant valuable effects to Infantry allies. Or, more generic stat boosts like Drive Atk or Distant Guard can be used to support teammates of any type. 
• The choice of boon largely depends on the skills used. +HP is a great choice if using HP-reliant skills like Infantry Pulse and Sudden Panic. +Res can be used with skills like Sabotage Atk. +Atk is a good option if Gharnef does not need more HP or Res for other skills, as it improves his combat slightly. -Def is generally a safe choice of bane. 
• R Duel Infantry 4 is the ideal A skill for use in Arena, or any mode with similar BST-based scoring. Otherwise the optimal choice depends on the other skills used.