Board Thread:General Discussion/@comment-24973452-20160905181416/@comment-44104894-20191106205341

"They" is a mysterious nickname. I headcanon Napstablook to be male because of Dapperblook. If everyone else calls them "they" it's probably because they can't remember Napstablook's gender. Still, there are arguments against this, such as the fact Napstablook was never called a "he" in Undertale's source.