Otherkin

Spirits are incorporeal, so they cannot be materialized as you can't make something out of nothing (so I wouldn't use that as an argument for belief in them). It's a deeply personal identification for those who are serious about it and is typically a process that takes some time, a lot of introspection, and finding oneself. I personally wouldn't trust anyone who just willy nilly calls themself anything that has nothing to do with who they are and what they do and you'll find those types in any community.

Interesting subject. I've never heard the term. I've always felt somewhat different than most peoples whole life but being raised by devout Christians I shunned things considered "unChristian like" until I became an adult. I've been extremely sensitive to other people and energies around me.
I could very well be one. I don't know for sure