It would probably kill anyone full stop, but in that scenario, being Zenitsu is truly suffering.

"It wouldn't hurt to look, at least." It still would be a pretty strange coincidence - he'd be pretty shocked if he found something depicting the people he knew back in his own world, after all. Maybe he shouldn't dwell on that thought for too long, though, if he doesn't want to end up getting bummed out, too. "If you get lucky and do find something, that might actually be something nice to have around."

Rather than just a plush of yourself, that's still so weird to him, why did the robots do this??