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As a child Peashy is a short girl with strawberry blonde hair with large red hair bobbles and cerulean blue eyes. Her clothes consist of a one piece short jumpsuit with a bee-like design accompanied with star designs on the lower half and also on the sleeves. She wears large red shoes and boxing gloves in the shape of bear claws.
Peashy has a very energetic and outgoing personality. She loves to play around a lot and is a bit on the rough side. She's prone to tackling others and breaking objects. These habits are shown when she frequently tackles Neptune and when she constantly ruins the dolls Plutia makes for her. As tough as she seems, she's rather emotional and cries easily.
Yellow Heart looks completely different from her human form. Her hair color becomes blonde and grows in length, making it past her shoulders. She not only becomes taller but her breasts also grow significantly in size (to the point of being larger than Green Heart's). She wears a white, skintight bodysuit with matching thigh-high boots and a choker, all three decorated with traces of black, red, and yellow.
Yellow Heart's personality is almost exactly the same. The only difference is she becomes slightly more serious to a degree but still views combat as if it were nothing more than a game. Her ditsy and slow ways remained unchanged, however.
- Due to scheduling conflicts, FUNimation was forced to replace Sandy Fox with Tia Ballard for the English dub of the anime.