Moth Flight is a white she-cat with soft fur and stormy green eyes.
She was the first medicine cat for WindClan. She found the Moonstone, and was named as medicine cat because her natural ability to read signs, and wasn't good at focusing when it came to fighting and hunting.
Moth Flight created the rule that medicine cats cannot have a mate or kits, because she went through a difficult ordeal when she had her own family. This is why she was so angry at Leafpool when she discovered that Leafpool had a mate (Crowfeather) and kits (Lionblaze, Jayfeather and Hollyleaf).