Mikiko Kawamoto (nicknamed Miko) was a supporting character in the original Devilman manga. Mico was a girl in her late teens with short black hair. She was only shown wearing a single outfit with a jacket, checker hat, a scarf and wide-legged pants with a flower pattern.
In Devilman: Crybaby, she is on the same track and field team as both Akira and Miki. She was one of their childhood friends as well. Devilman Wikia