Okay so I have a somewhat weird/annoying/vague...? question! This guy is from a game that for all intents and purposes, let's just say it's pretty similar to Persona. Anyway, people make contracts with MINDs and are able to summon them in battle and whatnot, but this guy is sort of a special case and his contract falls under a subservient one in which basically it's semi-explained that someday his MIND is probably going to eat him someday. At the start, however, he just takes an arm and because of this, Leo's arm appears as a demon one, like so. To begin with, it can only be seen by those who also have MINDs, so I'm assuming that normal people see it as a regular arm anyway, but since he at least would be aware of what it looks like, I'm just wondering: since his MIND would be considered an item that would be taken away, would his arm return to normal for that duration as well? And as an aside, with the MIND taken away, would the characters probably notice like a disconnect from the entity?

Sorry for such a long-winded and confusing question! e_e But thank you in advance!