Ei Aoki (あおきえい, Aoki Ei) is a Japanese anime director. He credits the show "Megazone 23" as his inspiration to have a career in animation. In 2013, he created the animation studio Troyca with Toshiyuki Nagano and Tomonobu Kato, which began animation production on its first work in the fall of 2014. Aoki was the main director on Girls Bravo, Ga-Rei: Zero, Fate/Zero, Hourou Musuko, Kara no Kyoukai: Overlooking View, and Aldnoah.Zero