also my thoughts re: what Eichi did after graduation would be like. He's started his own Production of a sort, would probably be down to assist in imeeji², but his idols are definitely like
He's much more harsh with them and expects a lot, and he's super willing and happy to absolutely break them, but he has an eye for talent and probably keeps some way to manipulate them on a back burner
he's working on getting stronger and establishing himself more as a demon, of course, so he's the kind of bitch to grasp at anything that might give him more power
it would be easy to get him doing shit in court with the incentives offered. He likes luxury and I'd give him objectives that make him lean into his social skills
mostly i like the idea of Eichi after imeeji trying to start his own little "nation" and to start working towards that he recruits folks who he can turn into hardened idols/assassins
They sing! they dance! they're good at taking orders and murder! And of course if they're any good at it he compensates them well enough that they don't feel a need to bite back. Or they at least fear someone more loyal and stronger