Heart has gold unkempt hair and green eyes. She is often shown with happy or confused expression on her face. In her first appearance, she wears a lavender leg-bearing dress or sweater, sleeveless and somewhat torn with large petal shaped pockets. She also wears a large slightly torn bandana styled to resemble her hair and tied with green sphere-like jewels. The bandana also has a pink heart-shaped sticker, hence her name, and sticker of her name and she wears a pair of black leather boots. She is also quite busty for age which many girls are jealous for.
Her soul his yellow with unkempt hair.
Her clothing changes later on to a floral themed hairband with a flower on the left part of her hair, she now wears a tight yellow shirt exposing a very small part of her abdomen with brown shoulder straps, and a pair of black and gray jeans with a brown leather belt with thick black straps.
In Weapon form, she takes on the form of a spear.