Miyako is a teenager with short brown hair and brown eyes. She is wearing the Satsukiyama Academy school uniform consisting of a brown double-breasted jacket, a white sailor shirt with a black trim, and black skirt with knee-length black socks and black loafers. She is known to have a dolphin charm attached to her cell phone.
Miyako is friends with Erina Yuzuki and Yuma Okita is a part of their clique. Together, they took part in Tamaki Minase's bullying. However, while trapped in Heavenly Host, she apologizes for what they have done to Tamaki.