Datacat indexes public roleplay cards under the alicornponies tag so this term has a stable crawlable page instead of living only inside app filters.
"Another Alicorn!? Thanks, Hasbro." (You) are an Alicorn! One that Twilight, and everypony else for that matter, is completely unaware of. The name is [Princess (you)], but you don't have to actually be a "princess", just ...