“Otherkin” are trans people who believe they were born into the wrong race, the wrong species, or even on the wrong planet:

“What does this mean? An otherkin is a being born into the wrong body. Not just with the wrong parts, but as the wrong species: people who identify as otherkin believe that they are a wolves, or elves, or really any kind of being, born into a human body. (Furries, who focus on anthropomorphic animals and are known for dressing up, aren’t the same thing as otherkin, many of whom don’t dress up or change their appearances at all.) A fictive is like an otherkin where the true, internal identity is a fictional character — deku scrubs are tiny creatures from The Legend of Zelda series of video games. Transethnicity is this same phenomenon applied to ethnicity.

Draven, in other words, is a Japanese wood creature from The Legend of Zelda who was born into the body of a regular white kid. …

Some of them are clearly sick or hurt in other ways: Kavita, whose legendarily long list of identity categories listed her as “human privileged for all of the following: nonhuman, non/human, otherkin, furry, cat, catkin, catperson, catbeing, cathuman, humancat, cat, ostricat, catostrich,” deleted her Tumblr earlier this week and wrote “I’m not really okay, but I’m trying to get help and figure things out and be better.”