cool! I've been Underswap Sans a lot, and I could interact as him with any of those characters you said, it'll be your pick of which you're comfortable with ^^
hello~! I've gotten like, super into underswap, and really wanna role-play as underswap sans!
I'd preferably like to role-play with sans and papyrus, or even with Underfell or Undertale sanses.
I dunno, I just wanna role-play as underswap sans!