Reiko Makigami, also known as Autumn, is one of the main antagonist from the Infinite Stratos anime and light novels.
A member of Phantom Task who pilots the monstrous IS Arachne. She was tasked to steal the Byakushiki unit from Ichika during the school festival.
In the XP4 fics, Autumn is a member of the Dark Forces and is part of the Miyamoto Faction.
In the AWA fics, Autumn first appeared at Chapter 5 of All Worlds Alliance Missions - Infinite Stratos.
Reiko has a long orange hair and red eyes, she wears a black top, dark-blue denim shorts and green boots
Autumn is a rash, hot headed, arrogant, sadistic psychopath. She is a least capable of restraining herself when she has to or is order to by Squall. She can even put on an act as a professional saleswoman when she first approach Ichika, to which shows her manipulation.
She pilots an IS called Arachne, a eight-legged 2nd generation IS that was stolen from the USA. She is skilled enough with it to overpower Ichika but was easily bested by Tatenashi afterwards.
- Her cover identity's first name was "Ayako" in the novels, but it was "Reiko" in the anime.
- In the AWA fics, Autumn was killed in the hands of Gingka Hagane and the Sniper.
- In the AWA fics, Autumn is the first on-screen casualty.