Vamp said I could post her design for Lurien the Watcher, so here's our headcanons and also our design for him as a human! We headcanon him as this posh guy with a heart of gold despite being a neurotic asshole. He is IMMENSELY loyal to the kingdom and its strive to be eternal, and will put his efforts into that. He's like if Flug from Villanos was a good guy. Dedicated and competent, but with the composure of a Tasmanian Devil.
We also headcanon that he's a butterfly, specifically Joni's half-brother. He forsook lifeblood to serve the Pale King as his Watcher. The Pale King doesn't know this, however, as the man covered himself fully even before swearing himself to him. He was always a weirdo.
He cannot stand Tiso.