Reiko Makigami

Reiko Makigami also known as Autumn is one of the main antagonist from the Infinite Stratos anime and light novels.

Reiko is a member of Phantom Task who fought with Ichika Orimura during the IS Academy's anniversary. She also revealed to Ichika that the ones responsible for his kidnapping during the 2nd Mondo Grosso was the Phantom task, to only then taunt him on the reunion with them.

In the Heroes Coalition fics, Reiko is a member of the Dark Forces and is part of the Miyamoto Faction.

Appearance
Reiko has a long orange hair and red eyes, she wears a black top, dark-blue denim shorts and green boots

Personality
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.

Abilities
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.

Trivia

 * Her cover identity's first name was "Ayako" in the novels, but it was "Reiko" in the anime.