Lupin is a silvery gray she-cat with darker paws, tail, chest, muzzle, and ear tips and icy blue eyes.
- Lupin is a member of the Renegade Squadron.
- It is noted that she is new there. She still has her blue eyes and still has her feelings. She is slowly getting confident about being there.
- She later warns WindClan and ThunderClan about the Renegade Squadron. SHe makes some friends, Iceshine, Echowind, Ashkit and Lilykit. Cloudstar lets her stay in WIndClan for the time being.
- When Pip, SlimJimpelt and SlimJimpelt's kits, they ask her to join their clan. She says no and Pip gets mad. Pip tries to kill her but fails. Iceshine then kills Pip for revenge. When she comes back to camp, Bat starts fighting Iceshine. Echowind picks up Flint and shook him around. Frostypaw gets mad and claws at Echowind's eyes. Lupin gets angry and nearly kills Frostypaw.
- She becomes mates with Sasuke and gives birth to his kits.
- Angry at Ichi, Lupin darts into Ichi's household and he and Cobra trap her in a room. Terrified and not knowing what to do, Lupin jumps out a window and falls to her death. Her death is blamed on Ichi and Cobra, even though they didn't kill her. Sasuke and all of Team Sasuke and devastated after hearing this.
- Sasuke (formerly): Living
- Kiba: Living