美咲 四季 / シキ

Shiki is a stylish girl who makes a contract with Neku. She is outspoken and can easily befriend others. She has an avid interest in the latest fashions, and had a dream to become fashion designer. Shiki keeps a photo of her best friend, Eri, and herself on her cellphone and looks at it frequently.

(Taken from Shiki's section on Wikipedia.)