Fellow student and collector of violent videos. Assists Ángela in identifying the camera used in the snuff film and discovers a hidden tunnel containing shelves of snuff tapes. Initially appears to be stalking Ángela, but ultimately helps her by fatally shooting Castro during a confrontation. Survives and is hospitalized.
Chema becomes Ángela's main investigative ally despite her later suspicions.
Chema helps Ángela identify the camera used in the snuff film and later explores the hidden tunnel with her.
Their former friendship becomes a source of suspicion and conflict.
Yolanda says that Chema was once a friend of Bosco, and Chema later admits that he knew Bosco.
Chema stops Castro's execution attempt.
Chema appears while Castro aims a gun at Ángela and wrestles with him, causing the gun to go off and kill Castro.
Chema knew Vanessa through the earlier workshop group.
Yolanda states that Chema, Vanessa, Bosco, and Castro attended a series of director's workshops together.
Yolanda's account connects Chema to the group's disturbing past.
Yolanda identifies Chema as one of the people who attended the workshops and says he was obsessed with snuff films.
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