Princess Julieta

Princess Julieta (real name Julieta Castleford) is a 3-year old princess human and she is Juliet's younger sister, she appeared in The Simpsons Video Games
The Simpsons Arcade Game
Julieta's first appearance, her theme is Luna Clock, she is the boss of Stage 8 
Bart vs. The Space Mutants
Sundally, Julieta was never appeared in this game, but her older sister Juliet was here and boss of Stage 3
Bart Simpson's Escape from Camp Deadly
Julieta is the boss of Stage 13