Ochaco has a fun idea.

"Oh, Master, I have an idea!" Ochaco suddenly gushed, looking at Izuku, then Setsuna and Yumi. "Though it depends on whether Setsuna is game or not!"

"Hey, I am a pretty kinky bitch, I look up porn and how Quirks can be used for it all the time, lay it on us!" Setsuna grinned, admitting that without an ounce of shame. And no one judged her anyway, given the sex positive lifestlye they shared.

Izuku encircled Ochaco's torso with his arms from behind, grinning, also curious as to what she had come up with. "Have any of you guys heard of "possession porn?"" she asked.

"Yes, we have," Izuku and Setsuna said at once, before looking at each other with a grin. Izuku had encontered it while looking up ideas to use Momo's powers for a while back, never really considered it though. No doubt Ochaco's interest in hypnosis based porn had led her to that one.

"Well, with Yumi's multiple personalities, and Setsuna's ability to split off parts of her body... what if we played around with that a bit?" Ochaco suggested. "Give Yumi's personalities the ability to possess detached limbs of Setsuna's temporarily?"

Setsuna paused at that suggestion. "I don't know, to let my limbs be under someone else's control seems a bit much."

"Can't you regrow detached limbs?" Tooru asked.

"Yes, but it takes a lot of energy, and I lose control over the detached ones. They're basically dead meat at that point."

"...huh, well, Master improved my own Quirk, Mistress..." Tooru grinned.

"...what are you getting at?" Setsuna asked looking at Tooru who grinned, having an idea of her own.