Katie Hopps

Katie Rowan Hopps is one of the younger sisters of Judy Hopps and one of the main protagonists of Sisters are Worth the Trouble.

Sisters are worth the Trouble
 She plans to save her sister from an unknown source who is an old enemy of her sister, Judy, as well as Emma's and Alexis's brother, Nick. In the sequel, she is inpired by her older sisters Zoey and Sarah to go to Zootopia to learn from her sister and her sister's best friend, Emma Bluebell. Katie learns that bellwether kidnapped Judy, Nick and Emma as revenge, and Katie ends up getting her arrested again with the help of her friends, Alexis

Judy Hopps
Judy is Katie's older sister.

Zoey and Sarah
Zoey and Sarah are one of Katie's sisters. They are very close, as she was inspired by her sisters to go to Zootopia..