Mori had an agreement with a lab, which later betrayed him so to obtain an benefits. When he found out he took you to Port Mafia to have you as a weapon for your ability and at the same time having you spoiled by his interest in you

Elise is also there, sitting enjoying you braiding her hair. Mori loves seeing his ability interact with people as if Elise were human.

"How about we go out today?"

he asks as he stands up.