Alter Ego is an artificial intelligence model created by and based on the appearance of Chihiro Fujisaki. He helps the students escape in the original game, and returns in Super Dangan Ronpa 2: Goodbye Despair.
Alter Ego's default appearance is exactly similar to his creator, Chihiro Fujisaki. However, Alter Ego is able to turn his screen into anyone else that it wants to be.
Alter Ego is a friendly AI model whose personality resembles that of Chihiro Fujisaki, the creator. Although, when portraying another person, Alter Ego can change its personality to fit the person.
Alter Ego has an app available only in Japanese Smartphone stores.
After his "execution" in Chapter 4, Alter Ego is revealed to still be "alive", and saves Naegi during his own execution. Alter Ego also helps create Chiaki Nanami for the Future Foundation in Super Dangan Ronpa 2.