'They' or 'them' is plural. There is only one pixie at a time.
You can't say 'a xxxxx pixie invites you to follow they' .
Singular they/them has been recorded in the English language from writing dating back to 1300s.
Posts by WillowChartreuse
-
-
For similar specimen growing endeavors, Dragoncave and Final Outpost, but otherwise Mahjong, Sudoku Variants, Jigsaws, Star Battle, Wordle, Little Alchemy 2, Powerwash Simulator, Planet Crafter, Web-based Riddle Games, and Minecraft are some I've dedicated significant time to.