Her name is Apple Sour (or Sour for short). She is 5 and is a female equivalent to Vanilla Cake.
Apple Sour has pale orange skin, brown eyes, and orange hair in a bob haircut. She wears green goggles, a gray dress with a black belt, and an orange tail.
Apple Sour is a tomboy. She plays rough, likes to get dirty, and likes to fight with other people, especially with the other Applebuck Guppies. She eventually cleans up and mellows out.