Mahito

A Green Jujutsu attacker who specializes in instant kills. Many of his skills can outright execute an enemy based on his Jujutsu Stat versus the target's remaining HP, making him a unique answer to high-HP adds and certain bosses that he can simply delete rather than chip down.

His Ultimate is the centerpiece — it deals percent-based HP damage to the whole enemy team and expands a Domain that, while active, makes every skill he uses carry a high-effectiveness instant kill and buffs his survivability. Crucially it grants him Guaranteed Hit and pierces enemy Attack Immunity, so it bypasses both defensive buffs on the enemy and accuracy debuffs on himself. It is his execution window where he is at his most dangerous.

S3 is his hardest-hitting skill and itself has an instant-kill chance; inside the Domain it gains a self Jujutsu buff and even stronger execute effectiveness, so it is his main damage and kill button.

S2 builds his Ultimate gauge and grants him evasion through Miniaturization; inside the Domain it transforms into a damaging attack with a Damage Received debuff and its own instant kill — turning a utility skill into another execution tool.

He also flexibly attacks using whatever element the target is weak to (regardless of his own type), so he ignores type disadvantages and stays effective against any color of enemy. A passive keeps him alive with HP regen and damage reduction that scale with low HP and high Cursed Energy.

His main drawback is the comedown after his Domain: it drains his Cursed Energy and blocks his Ultimate charge for a couple of turns. He is best used as a specialist executioner — bring him for content full of high-HP enemies he can instantly kill, where he massively outperforms a normal damage dealer.