Belle is a member of the Proxy team Phaethon in Zenless Zone Zero, alongside her older brother Wise. She serves as the emotional anchor with her sunshine-type personality, being very active, expressive, and unafraid of difficulties. Belle whines, jokes with her brother, and shows displeasure when stopped, but gets depressed upon failures. Despite sibling bickering, they trust each other deeply. As a guide rather than combatant, her physical stamina is average.