Ly is a fairy and a close friend of Rayman. She made her first appearance in Rayman 2: The Great Escape. She can create silver lums, which gives Rayman new powers throughout the game. She is kind and serious, and likes to experiment with her magical powers in her spare time. She may look weak, but can be dangerous if she has to be, and is Rayman's girlfriend.
- Rayman 2: The Great Escape/Rayman 2: Revolution - She helped Rayman by giving him powers to succeed later on in the game.
- Rayman 3: Hoodlum Havoc - Although she physically does not appear, a statue exists of her in a secret room filled with some goodies in the last part of The Longest Shortcut.
- She appears on the covers of Rayman Arena/Rush, but is not playable.
- Rayman 3 (Game Boy Advance) - She gives Rayman new powers and gives him news on Globox's whereabouts.
- Rayman Raving Rabbids (Game Boy Advance)- She gives Rayman special costumes and explains what the Rabbids want.
- She looks like a cross-breed of a human elf and a wolf, as she has pointed ears showing, and a tail peeking out of her jumpsuit. She is also seen running on all fours in Rayman 2/Rayman 3D during bonus levels, such as the "Walk of Life".
- She made a cameo appearance in Rayman 3: Hoodlum Havoc.