Character: glitterhoof (crusader kings)
Glitterhoof is a unique recruitable character in Crusader Kings II. He or She (this character can spawn in the game as either) is a talking horse that can only be encountered and recruited by a player character who has the "Lunatic" trait. In Crusader Kings III Glitterhoof returns as a cameo / easter egg as "Errorhoof" who only appears when the game experiences an error or glitch.