Trioculus

Trioculus is an existing character from Legends.

Shortly before his death in 5 ABY, Cronal claimed that Triocolus – or at least his representation of Triocolus in the holo series "The Jedi Prince" – had been chosen by him as a deliberately unworthy successor to Palpatine, in order to prepare the public for the eventual acceptance of the real Palpatine's return.