Serenity Wheeler is Joey Wheeler's younger sister. The two were separated at a very young age when their parents got divorced. In both series of the anime and the manga, Serenity is depicted as being a sweet-natured, gentle, fragile and dependent young girl. She has a small fragile body, flowing auburn (brown/red) hair, and gentle dull greenish brown eyes. Throughout the whole series, she is pictured as gentle but strong, with a never-changing attitude of high spirits.