I love the idea of Kouyou going full on big sister rage mode when her "little brother" is actually in danger. Even better if she swallows her pride and forces herself to work with that "fake older sibling" Verlaine.
Okay so like imagine that scene in promare where Lio is being used as an energy source but instead make that Agatha who captures and uses Chuuya's singularity to create a mega nuke just so she can take out Port Mafia and Verlaine 🤔