IRIS is blue-tinted due to the fact she is a hologram, and has dark blue hair, blue skin, blue eyes, light blue lips and a blue shirt. As noted by your character, she looks extremely like Lila, which IRIS thinks is because Everett Rourke, her creator, had a 'type'.
IRIS is programmed to be helpful and think strategically. She is not programmed to have facial tics so it is impossible to tell if she is telling the truth or lying. Like Rourke and Aleister, IRIS speaks with a British accent. Her Achilles heel is Directive 1908, which makes her 100% obedient to Rourke. It also drastically changes her personality, bringing out her caring and affectionate human side. However, Diego's Catalyst Idol shows it could possible make her act cold blooded and homicidal.
IRIS acted as Everett Rourke's personal assistant that he would consult until he told her to self-destruct. In Book 2 Chapter 3, Rourke uses Directive 1908, which resets IRIS's personality and makes her unquestionably obedient to Rourke. In Book 2, Chapter 8, it is revealed that she is the artificial intelligence of Aleister's mother, making her Everett's wife.
When conversing with Rourke, it is shown that she is deeply concerned about Your Character and their classmates despite the fact that she has never met them. When Rourke uses directive 1908 to make her obedient to him, you can either choose to tell her to fight him or call her a traitor. In Book 2, Chapter 8, she tells you that she knows how to get your group off of La Huerta and back home. In Book 2, Chapter 9, she reveals that Directive 1908 prevents from acting against Rourke but she still cares about your group. She reappears in Book 3, Chapter 6 and once again gets your main character and your friends into trouble.
- In Book 1,Chapter 10, do not guess IRIS' name correctly on the first attempt, even if you have played the game before and you know the right answer. Blood will gush out of your eyes and nose and you will die. The games will also give you a warning about cheating.
- Diego's Catalyst Idol shows him and Varyyn getting gunned down by IRIS.
- Iris has a slightly different design in Book 2, as her pixels are now animated.
- The writing for IRIS' character is inspired by the song, Utopia by Goldfrapp.