Nemu Miyao

Birthday: December 5
Age: 15
Species: Witch
Gender: Female
Height: 152 cm
Weight: 42 kg
Hair Color: Black
Eye color: Black (Manga), Blue (Anime)
Aliases: Shape-Shifting Witch

She's a witch known as the Shape-Shifting Witch and a member of the Miyao Family, an elite witch family.

She's one of Nico's friends and ally of the Otogi Household.

Just like Nico, she usually wears lino dresses or her school uniform when at school. She has long black hair that she ties up into a bow on the top of her head with a spell. She's also seen wearing a normal bow that's not composed of her hair.

(Source: Witch Watch Wiki)