Princess Monster Wife is a character in the episode of the same name. Princess Monster Wife was created by Ice King using parts he stole from the princesses of Ooo. She is very worried about her appearance and origins most of the episode, but she tries to be a normal housewife for Ice King and he seems to care for her.
Princess Monster Wife's makeshift design causes her problems with eating and she makes many unintelligible sounds in the episode. She is extremely ugly, causing Finn and Jake to faint when they look at her. She also makes a penguin throw up by blowing a kiss at it. She recognizes that she isn't normal when she sees Ice King's ice statue of her after he sings "Let Me Show You Something Special" to her. Finn, Jake, and the penguins make her feel ugly and unnatural, ultimately causing her to lock herself in the bathroom and cry. After Princess Monster Wife finds out that she is stitched together from other princesses she returns her body parts to their rightful owners. The only thing that remains is a red cloak, and her sadly final goodbye to Ice King from her disembodied voice.
Princess Monster Wife is shown to have obvious self-image issues, to the point of locking herself in a bathroom to cry. New to the world, she is quite innocent and tries her best to please others. She appears to genuinely care for the Ice King.
At the end of the episode, she commits a sacrificial act of kindness and heroism by giving up her own life to return the stolen body parts.
Princess Monster Wife is a tall princess made up of parts from the princesses of Ooo. She has obvious stitching connecting the parts to one another. Her mouth is made up of three head pieces and looks unnatural as a result, with the left side of her mouth connecting to both of the right sections at uneven angles. Each part of her body is covered by the clothing that its respective princess would wear on that part.
Princess Monster Wife has the right half of Princess Bubblegum's face, the left half of Turtle Princess' head, Lumpy Space Princess' chin, Wildberry Princess' right arm, Muscle Princess' left arm, the back half of Hot Dog Princess as a right leg, and Skeleton Princess' left leg. She also has less distinguishable parts in her midsection, with the only clearly recognizable part being Doctor Princess's labcoat. Ice King also says she has Elbow Princess' hips, Dr. Princess's heart and intestines, and Slime Princess' bottom. She wears the tiaras of Princess Bubblegum and Turtle Princess on their respective head parts.
- Because Princess Monster Wife has the mouths of Turtle Princess, Princess Bubblegum, and Lumpy Space Princess, her voice is a combination of those three princesses' voices.
- In the ending of the episode, Lumpy Space Princess did not get her lumps back; she got Turtle Princess' missing part of her face. Later episodes show they have fixed this.
- Princess Monster Wife is the first monster that Finn and Jake were unable to fight because the mere sight of her caused the two heroes to faint.
- The portion of Lumpy Space Princess' face that is attached to Princess Monster Wife slightly resembles cleavage.
- When puckered, Princess Monster Wife's lips look like Lumpy Space Princess' lips after she drank the potion that gave her "luscious lips" in "From Bad to Worse."
- Despite being made up of Ice King's favorite parts of his favorite princesses, he stated in "Loyalty to the King" and "Hitman," that Lumpy Space Princess is one of his least favorite princesses.
- The formation of Princess Monster Wife's head is made up with Princess Bubblegum and Turtle Princess, this could be a possibility that the Ice King likes smart Princesses. As shown in "Holly Jolly Secrets Part II," the Ice King (Simon) misses his partner Betty who seems to be a smart person.
- Princess Monster Wife is the only known princess to not reject Ice King, though this is likely because she was created by him.