Friend, you either have bad memory or you just skipped through the main story.
The assassin was that fey that attacked Chloe during the main story, later Lyx merged them.
And later on in the main story, Chloe absorbs the cupid or bimbo.
The bimbo is available for sexy time from act 2 but the assassin is only on act 3.
And yeah, Northern Light, it’s a rehabilitation center you can build, but due to a bug you can send people there before it’s even built.