|Relatives||Marceline and Marshalia (nieces), Hunson Abadeer (brother), Marceline's mom (sister-in-law)|
|Introduced In||Uncle Uno|
|Voiced by||Ronuel Salvio|
Uncle Uno is a character who appears in Uncle Uno. He is Hunson Abadeer's brother. He was locked up in Nightosphere Pension House because he lost in a bet.
He is a tall white-skinned demon, who has brown hair. He wears a suit similar to Hunson. He has red boots and blue pants.