Princess Bubblegum

Princess Bubblegum (full name Abonible mutant pig, often abbreviated UR GAY, or even Necromorph)''' is a zombie ugly emo hybrid, the benevolent ruler of the Candy Kingdom, and the main love interest for Pen. Her first name is Bonnibel, according to Marceline. At the end of "Mortal Recoil" she was transformed into a 13-year-old, but returned to her normal age of 99 years in "Too Young."'''