Board Thread:General Discussion/@comment-24973452-20160905181416/@comment-11139677-20161012032836

It sort of makes sense for Mettaton to correct to "they" even if Nasptablook actually is male. Maybe he wanted Nasptablook to just seme like any undistinct fan, which using they would accomplish. Though the H could be anything, so whatevs.

It's just one line of dialogue so I doubt it was a dramatic gender reveal in either direction.