Really someone should make this into a JRPG game with wacky skills. The characters, plot, and mana system really fits JRPG game. Mana crystals can work like orbments in Trails series.
Touka basically has passive x10 stats boost when fighting against female opponent.
Empty Exuvia is basically passive auto-dodge when the enemy hits critical but can only be done 3 times per battle.
Not even mentioning the necromancers' ability.
Didn't expect a manga starting as gag story to have an epic lore and battles.