Belle's regular attires include a pink dress, stretch pants, and shoes. She used to wear a golden bell around her neck until she lost it and now wears a sea green collar with a pink heart on it. Her ears are pink while the rest of her body is cream colored. Unlike other robotic cats, she has a more human-like appearance.
Her thief outfit consists of a dark purple leotard with a lavender top part and dark purple coat-like collar, a black waistband with light purple buckle, a dark purple mask, long gloves, and knee-high boots. While in this outfit, she is known as "Kaito Rose" (怪盗ローズ Kaitō Rōzu).
Doraemon has a crush on her, but Belle isn't impressed by him due to already having a boyfriend.
- Her name is based on a bell.
- She makes a cameo in episode Look at Doraemon! His Secret with animation update design.