Several reasons. [ Of which he can go into later, going silent to listen intently to the answer. He's not sure what he was expecting but Lili's answer seems...right. The answer begs another question however, Mikazuki is ever the curious sword. ]

What exactly should I say to let someone know they're important to me? Deep things like that are a bit...strange for me. [ Ever since that Mirror Room™ though, he's been trying to understand how all of these human emotions are supposed to work. His fingertips flinch upon seeing her darkened expression, wholly unsure but he moves to very gently pat her hand in what he hopes is comforting. ] Ah, if what I'm asking is too much to answer then please do let me know.

I tend to not be able to gauge what is considered "too much" sometimes --