Ayaka Saito

Ayaka Saito (斎藤 綾香, Saitō Ayaka) is a live action-only character and the childhood friend of Nagisa Shiota.

Nagisa Shiota
In the live action, Ayaka is Nagisa's childhood friend who lost touch with him presumably after he was dropped to Class E. She cares very much for him and offers him support secretly from the sidelines.

Etymology

 * The name Ayaka means "design" (綾) (aya) and "fragrance, fragrant" (香) (ka).
 * Ayaka's surname Saito means "religious purification/purification, Buddhist food, room, worship, avoid, alike" (斎) (sai) and "wisteria" (藤) (to).