Ruberiot is a young Mewman man with light skin, green eyes and short orange hair that usually obscures his right eye. He wears a powder blue shirt, frilly bluish-gray shorts, bluish-gray boots, a dark grayish-blue hat with a light blue feather on top, and a purple scarf. Ruberiot also has a very thin mustache, and a short, pointed goatee.
While on stage during Star's Song Day celebration and performing "The Ballad of Star Butterfly", Ruberiot wears a lavish white and gold glam-rock outfit with light blue trim and a deep blue cape.
Ruberiot appears in season 2's penultimate episode "Face the Music" as the newly appointed songstrel of Mewni, tasked with writing a "Princess Song" for Star Butterfly's Song Day celebration. However, because of her negative views toward Princess Songs, Star initially refuses to work with Ruberiot on the song, placing some of the blame for why Princess Songs are so trite on songstrels in general.
As it turns out, however, Ruberiot's primary goal is to break the long-held tradition of old-fashioned Princess Songs and write something for a "real princess". Thus, he and Star collaborate on writing and composing an epic rock ballad depicting Star's life. Unfortunately, through some of Ruberiot's non-approved lyrics, he reveals to the populace of the kingdom that King and Queen Butterfly kept the theft of the book of spells and Glossaryck secret from the Magic High Commission and that Star has a crush on Marco Diaz. Because of this, he inadvertently instigates a riot among the Mewmans.
Ruberiot mentions briefly that he once pursued education to be a "lawstrel", but dropped out of school.
In Star vs. the Forces of Evil: The Battle for Mewni, Ruberiot was first seen attending King Butterfly's many parties that were being held at his castle to keep the people happy while he was in charge. He then later gets roped into taking part in a resistance movement with Marco, Foolduke, and Mime Girl after Ludo takes over Butterfly Castle. He and his fellow performers are last seen chained up in the castle dungeon.
In "Booth Buddies", Ruberiot gets married to Foolduke.
- Star vs. the Forces of Evil: The Battle for Mewni
- Scent of a Hoodie
- Club Snubbed (mentioned)
- Booth Buddies
- Conquer (cameo)
Powers and abilities
- Instrument playing: Ruberiot can play the lute, the piano, and the electric harp guitar.
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- Ruberiot is voiced by Fall Out Boy lead vocalist Patrick Stump.
- According to series storyboard artist Sabrina Cotugno, Ruberiot's performance in "Face the Music" ended with him unharmed albeit "probably just super upset", despite his fears of being executed had the song not been finished.