Ayaka Kurusugawa (来栖川 綾香 Kurusugawa Ayaka) is the younger sister of Serika Kurusugawa.
Like Serika Kurusugawa, Ayaka has the same long dark blue hair and blue eyes, but she doesn't wear any witch clothing.
Although Ayaka and Serika Kurusugawa are sisters, they have contrasting personalities as Ayaka is a very outgoing and confident girl
- The name Ayaka means "design" (綾) (aya) and "fragrance, fragrant" (香) (ka).
- Ayaka's surname Kurusugawa means "come, due, next, cause, become" (来) (kuru), "nest, rookery, hive, cobweb, den" (栖) (su) and "river, stream" (川) (kawa/gawa).