[thankfully, they just told Yujin this, so it doesn't feel weird to follow it with:]

< It's not actually hot, just warm. But I assume it'd be difficult to melt in the first place, or it wouldn't be a reliable prosthetic. >

[which. they expect will probably lead into yet more questions. unfortunately, they're as in the dark as he is, since they're not feeling like letting someone take their actual head apart to discover how it functions. what if they can't get it back together again? no, best to leave well enough alone.]