King Clawthorne

King Clawthorne (voiced by Alex Hirsch in the present, Dana Terrace as a baby and toddler forms, and "squeak of rage" effects) is a small young titan with a skull-like head, and Eda's roommate who is the self-proclaimed "King of Demons". While it is not known if he truly is the King of Demons, he does have a confident and domineering attitude, which implies that he once held some greatness. He was initially frightened of Luz when he first met her, but warmed up to her when she helped him. King wants to be seen as "cool" and claims to have vast knowledge of all monsters and demons, though some of it might be based on his own false presumptions. Regardless, he is willing to acknowledge it if it was incorrect. While he is quick to poke fun at Eda, he cares about her and wants to help repress her curse. King is shown to be bossy and manipulative, but ultimately shows his heroic and caring side whenever he and his friends are in danger. His ultimate goal is to obtain followers and have absolute power, which results in him finding himself in ludicrous situations such as bringing dolls to life to do his bidding, becoming a teacher at Hexside, and using Eda in her monster form to rule a playground. All efforts usually result in him losing this "power" and things going back to normal. Despite his rambunctious nature, he cares for Luz and misses her whenever she goes out to Hexside or hangs out with others.
In season two, King's origins begin to be revealed. In the episode "Echoes of the Past", King is revealed to not be the king of demons. Eda found him as a toddler on an island, being watched over by a strange amorphous creature that she managed to evade. While raising him, she unintentionally convinced him he was the King of Demons. He discovered that he had just hatched from his egg and, believing that his father was someone important, has Luz reattach his horn so he can retain some memories to look for his father. In "Eda's Requiem", he legally gets adopted by Eda and changes his name to King Clawthorne. In "Knock, Knock, Knockin' on Hooty's Door", King discovers that he can produce an echoing blast after admitting that he is upset about his father leaving him. In "Edge of the World", it is revealed that King is a Titan. This news affects him emotionally and he begins to question his goals; it is only through a meeting with former Coven Guard Steve that he begins to accept himself. King ends up stopping the Day of Unity by releasing the Collector, who his father had sealed away in the past. King then sends Luz and her friends away to the Human Realm to protect them from the Collector's games. As he spends time with the Collector as his chosen playmate, King comes to understand that he is misguided rather than malicious and discourages Eda and Lilith from attempting to reimprison him. Upon Luz's return, King and Eda reunite with her and aid her in befriending the Collector and destroying Belos once and for all. In the epilogue, King's developing Titan powers allow him to create a new glyph system, which he begins to teach Luz.