豊聡耳 神子 is one of the major characters in the Touhou Project. She was first mentioned in Imperishable Night, though she herself would not appear until Ten Desires, in which she makes an appearance as a stage six boss.
She also will be one of the newer main characters starting in 東方15.
She is a Shikaisen who spread Buddhism across the country as ruler. Later, she met Seiga around 800 years ago around Kyūshū, and after their meeting, Seiga taught Miko Taoism.
Later on shortly before the events in Double Dealing Character, Miko, along with Seiga, managed to achieve immortality.
She has the ability to listen to ten people's conversations at the same time and can manipulate the sky.