Awww, no one could resist pouting chibi Yumi! I'm playing up Katnir's stubbornness a little for laughs, I think if the TO asked him with seriousness, he would concede because ultimately the TO's happiness would trump his pride. Something like, reassuring him but while preserving his ego. "I know you'd probably be survive somehow given how much you've endured, but I don't know if I could handle being apart-" (sort of a reverse psychology of asking him for what he secretly wants without calling him out? if that makes sense lol) Would be the kind of line that would push him to be all soft and vulnerable without forcing him.