re: Bec Noir having way more of Dave's prototypings than anyone else - we see the Black Queen with the tentacles and stuff, but did Jack have the tentacles pre Bec? and then did they just go away post Bec? what happened to the tentacles?

He did have Tentacles pre-Bec, and they faded along with the hat. He can summon them at will post-Bec addition. Also I mean, he does have the sword and wings that are more ‘predominantly Dave’s prototypings’ but honestly it feels more like. For the aesthetics.