Fairys

I think, it is not too hard summon a fairy or another similar being and ask his/her about. :-)

Most children believe in Fairies,Elves,Santa, and all such things.
But some of us grow-up!

Well, Santa is a phantasy. :-)
But some Fairys realy exist. As a spiritual beings.
https://archive.org/details/doktorjohannesfa00sche
Here is something about summonig since page 136 and followings.
But procedures from this book are not recommended.

Meditation on some fairies is sufficient and mostly without risk.

I would not classify elves and Fae with Santa as the first two are a part of Norse and Celtic Paganism, respectively.

As for the original poster, Otherkin is a legitimate concept in that the soul, spirit, or part of your mind is identified as something other than human, but even Kin know that they can't physically be anything other than human (the legitimate ones, anyway). However, they also believe that you don't "become" Kin because it is a part of who you are, much like you can't truly change your hair color (save for natural aging), but you can still dye it.

Once again,Lumpino, you are stating your belief as though it is a fact! "-fairys really exist". Do they? Really?