Okay so both space and locked doors are York's jam. He is not only a professional (and moderately successful!) lock picker, but his Astoria-granted power is phase shift so word is he will be able to get into three or four of the sealed doors. He'll be looking for advice on which ones to try phasing through, and will phase the door itself or pick the locks for others to get in according to what he sees inside.

If anyone who might want to team up has preferences on what he tries to get into, lmk!

There's also the possibility of him getting stuck!! And needing someone to break down or unlock the door from the other side to free him from a room if it's too hard for him to get into and he burns through his ability.