Sergio is part of a long-married couple trying to manage domestic responsibilities, children, work, and the boredom of a predictable relationship. At the gathering, he joins the provocative conversation and key game, becoming involved in the experiment that destabilizes his marriage and damages the group’s friendships.
A withdrawn game designer who has spent three years developing Ultimax and rarely leaves his apartment. Initially hostile toward Valentina because of her piano playing, he gradually becomes emotionally attached to her and eventually tries to support her audition and repair their relationship.
Pablo is a courteous man from Bilbao who becomes romantically involved with María. He discusses his thesis in professional deontology, his conservative father, and his childhood wish to play guitar. Later revealed as the successor to his influential father, he orders the cameras away from María during her chaotic television performance.
CEO of an important company and Bea's boyfriend. His public erotic scandal with TV reporter Rebecca Ramos leads to Bea's dismissal.
Fernando Guallar has 13 screen credits in a career dating back to 2019. Signature works include Red Queen, The Key Game, Follow My Voice. Explore the interactive character relationship maps on each title page to trace how their roles connect across franchises.
