Jack
Note: ST stand for Single Target and AoE is for Area of Effect
Note: C65 stand for crystal level 65
What he do
BRV ATK
Melee attack - Steals enemy's BRV
Change to 3-hit ST BRV ATK++ while Every Ounce of Strength active
Triggers Deliverance Increases BRV based on ATK; 6-hit melee BRV attack + HP attack; moves next turn to before target if turn would otherwise come after [except during summoning]) when inflicting Break
HP ATK
Melee attack - Expends BRV to deal HP damage
Change to 2-hit ST BRV + HP ATK++ while Every Ounce of Strength active
Triggers Deliverance Increases BRV based on ATK; 6-hit melee BRV attack + HP attack; moves next turn to before target if turn would otherwise come after [except during summoning]) when inflicting Break
Skill 1  (Ninja Slice)
Melee attack - 6-hit ST BRV + HP ATK
Triggers Deliverance Increases BRV based on ATK; 4-hit melee BRV attack + HP attack; moves next turn to before target if turn would otherwise come after [except during summoning]) when inflicting Break or attacking target afflicted with Break
While equipping EX+ weapon Dragonslayer+ with max limit breaks or passive ability Flash of Blood Extension: BRV attack hit count becomes 6; moderately increased cumulative BRV damage
Buff Every Ounce of Strength (raises MAX BRV, ATK) to self
Skill 2  (Lightning Flash)
Melee attack - 6-hit AoE BRV + HP ATK
Deals proportionate HP damage to each target
Triggers Deliverance Increases BRV based on ATK; 4-hit melee BRV attack + HP attack; moves next turn to before target if turn would otherwise come after [except during summoning]) when inflicting Break or attacking target afflicted with Break
While equipping EX+ weapon Dragonslayer+ with max limit breaks or passive ability Flash of Blood Extension: BRV attack hit count becomes 6; moderately increased cumulative BRV damage
Buff Every Ounce of Strength (raises MAX BRV, ATK) to self
EX+ (3/3) Skill  (Transience)
Melee attack - Cancels active Soul Harvest + reduces HP to 1 + increases BRV based on HP reduced + AoE HP ATK + 8-hit AoE BRV ATK + AoE HP ATK
Deals total HP damage to each target
Buff Soul Harvest (raises evasion rate; restores HP based on HP damage dealt) to self
Next turn after use does not consume ability use count
What can he provide
Damage. Turn manipulation with his skill 1 and 2 and BRV and HP ATK when he Break target.His c65 slightly raises own MAX BRV, slightly increased BRV damage with critical hits for 2 turns. He has Mighty Critical Hit and Back Attack in his passive abilites. His C68 moderately raises ATK. He has a A sphere: When dealing critical hit: Raises BRV damage by 5%, ATK by 5% for 3 turns
What can he be
Damage dealer
Overall thought
He is a damage dealer. He best tag with a tank as he has Back ATK (perform better when not targeted). He can self HP regen. He doesn’t debuff. His BRV and HP ATK need to Break target to triggers Deliverance, this might not work well with characters that also need to Break target to get something