Just a Passing Assassin...

[Lilium Mortem]

As long as there's a way to break the link safely if both of us end up hating each eventually or otherwise not get along, then I think that's the play, the mental link pseudo-entity contract thing.

And for plush make it have a hammer-gun with real transforming action. what kind of plush? oh yeah rabits fine. seems like theres a theme with rabits and magical nonsense, might as well lean into it.