Cirno
Cirno is an ice fairy that lives around Misty Lake and usually plays with Daiyousei, her friend, to keep her occupied. She's easily bored and acts very cocky, despite only being a fairy. But compared to other fairies, she seems to be rather powerful, and as you may guess, has the ability to manipulate ice and snow. She has short blue hair and blue eyes, and wears a blue dress with a giant blue bow tied in her hair. Her wings are made of icicles.
Daiyousei
Daiyousei is a young fairy whose abilities are unknown but assumed to be related to spring. Unlike Cirno, she's very shy, but a typical fairy: cheerful, mischievous, simple, and emotional. Her shy personality and assumed abilities may be symbolic to hers and Cirno's relationship, as Cirno is usually more outgoing than Daiyousei. In similarity, the winter (Cirno) ushers in the spring (Daiyousei) but this is just speculated. She has short green hair with a longer lock tied in a side tail by a yellow bow, much in the same hair style as Flandre Scarlet. Her wings are typical fairy wings, but with golden accents, and her dress is dark blue with a yellow ascot tie.