Before being found by Touya, Renne had a tomboyish appearance with a cap, dress shirt, and dress pants. Renne eventually begins to start wearing more formal wear when she becomes a housekeeper/maid of the Belfast Mansion.
Renne is a highly dependable person.
Renne's mother passed away shortly after she was born. Her father went on a quest to slay a magical beast and hasn't been seen since his departure. In order to survive, she was forced to become a pickpocket. At a later date she was attacked by two thieves because she stealing in their territory but before they could harm her she was rescued by Touya whose wallet she had stolen earlier.
After saving her and buying her lunch Touya found out that she was an orphan he decided to offer her a job working for him at his mansion. Although skeptical of his offer she would happily accept offer so long as she didn't pickpocket from anyone ever again, a proposal that she immediately agreed to.
- Dagger Technique - she is able to use dagger for self-defense or offense after receiving coaching from Cecile.
- Magic - Renne has a magical affinity for the element of wind. She has received magical training from Leen.
- "Oi, Bruv!" - Renne when she wishes to ask Touya a question.
- In the Light Novel, she speaks with a Cockney accent.