Yellow is quite naïve and acts very much like a little child. hates when Pokémon are injured, and has developed a style of battle in which neither Pokémon are hurt unless absolutely necessary. received psychic abilities from Viridian Forest, which include the ability to read the emotions of Pokémon and heal their wounds. Likes drawing and fishing. Has gender neutral behavior, but is actually female.

Yellow is age 15, 4'10" (148 cm) tall, and weighs 85 lbs (39 kg). Her birthday is March 3rd.