Depending on Kei Azuma's gender, their roles will be swapped. If the protagonist is male, Baraki will be the friend he grew up with and Sumire will be a young girl and Emi's classmate. Whichever one is the protagonist's friend will also become a Debugger. They're the "Chaos Heroes" of the game and will be the protagonist's partner if the protagonist chooses to align with Chaos.