She was given a red orb by Queen Nehelenia, which gave her more power, and eternal childhood.
She is the animal trainer of the Dark Moon Circus, and the second oldest of the Amazon Quartet. She is also very aggressive. In Episode 23, A New Nightmare (the first episode where they appear unshadowed), she attacked Zirconia, feeling that she and the others should be in charge, but was defeated. Her Remless are Garagara, Kerokero, Manemane, and Paopao Girl, all of whom resemble animals.
Besubesu always seemed to be fighting Sailor Mars.
Her name in the Japanese aneme is VesVes.
The Amazon Quartet were eventually defeated by Sailor Moon, and later trapped in another dimension by Zirconia after switching the captive Sailor Mini Moon around with a doll. Here they began to realize Zirconia's side was the wrong side because of Junjun. Zirconia drained their power, but they eventually smashed their orbs, giving up Nehelenia's power and eternal childhood.
When the Amazon Quartet took the golden crystal from Nehelenia during the final battle, Besubesu was the one who gave it to Sailor Moon.
Like Tiger's Eye, Besubesu attacks with a whip as her standard attack, and also uses throwing knives. Once powered up by Queen Nehelenia, she can also use a sticky ball to trap enemies in a sticky substance.