Aya Brea (アヤ・ブレア, Aya Burea) is a fictional character from the video game adaptations of the 1995 novel Parasite Eve by Square Enix (formerly Square or SquareSoft). An original character created by producer Hironobu Sakaguchi for the 1998 role-playing video game Parasite Eve, she is an NYPD detective who faces off against Eve, a being created by sentient mitochondria wishing to conquer life on Earth. In the 1999 sequel Parasite Eve II, Aya, now working for the FBI, is investigating further activities involving mitochondria. In the 2010 game The 3rd Birthday, an amnesiac Aya is found by the Counter Twisted Investigation (CTI) unit to fight against the "Twisted", mitochondria-spawned creatures that have gradually taken over the world.