Does Anyone Know If Napstablook is A Male?

Hello! Since recently I've gotten into the Undertale fandom and this is one of my most পছন্দ characters, and I've seen that they have the pronouns of "They" অথবা "Them" অথবা "It's." And I've been confused for quite a while and I just really want to know, what is their gender? And I hope it's male!