Oh my gosh, I'm very canonblind to Jojo's and yet that sounds very much like something I should have expected. (And after a quick Google search I... can't say she'd entirely disapprove of the reaction her image provoked...) Hopefully she won't traumatize him by just existing, lol.

(F/GO is indeed a wild ride, too. Da Vinci choosing to manifest as she does isn't even in the top ten of significant weird things that happen!)