Space Angel Princess is a princess of an unknown kingdom. She makes a cameo in the episode "What is Life?" in Ice King's Imagination Zone. She appears in "Loyalty to the King" with an updated design as one of the princesses being held in Nice King's cage. She shouts "Nice King, I love you!" when she is in the cage. She makes a cameo in the episode "Ocarina," in which she seems to be purchasing a room in Finn and Jake's home. According to the events of "Princess Day", she is a registered princess.
Space Angel Princess is a humanoid with purple-blue skin. She has a white bodysuit that reveals her skin at the face, ears (though they are not visible), and stomach. There are gray bands around her arms, legs, and neck. She wears brown boots with gray dots on them. She has a floating pale-yellow halo and wings of the same color.
In Space Angel Princess' earlier design, her wings and halo are a more opaque yellow and her boots are a tanner brown. Her body suit is a deep purple and only has a hole for her face. The bands on her suit and dots on her boots are not in this design either.
Nice King, I love you!
- The Passenger from the web series "Bravest Warriors" also by Pendleton Ward resembles Space Angel Princess. The Passenger has the same type of role as the Snail in Adventure Time, in that it has an Easter Egg-like cameo in every episode.
- She is referred to as "Alien Princess" in Cartoon Network UK's "Frosty Fight" game.