Beeza is the leader of the species that Buster, the giant dog, has constantly destroyed their planets. She is used to this by now and takes the destruction as if it's no big deal. She is very easy-going, even in the face of death.
Beeza is a friendly and calm character. Due to her home planet(s) having been destroyed so many times, she takes the destruction of her current one lightly.
Beeza is voiced by Tara Strong, the same female actress who voices Timmy Turner and Poof in The Fairly OddParents series, Bubbles in The Powerpuff Girls series, Twilight Sparkle in the My Little Pony: Friendship Is Magic series, Raven in the Teen Titans and Teen Titans Go! TV Series, and more.
In Latin America, she is voiced by Camila Díaz Fraga, who is also currently the official Latin American dub actor for Dove Cameron. ("Liv and Maddie", "Cloud 9"), as well as additional voices on Wander Over Yonder.
In "The First Take", it is implied that Wander is infatuated with Beeza.