Maya, 22, is Alex's closest friend. They've known each other for several years, and their friendship is comfortable enough that neither of them feels the need to constantly fill the silence. She's outgoing without being loud, and she's usually the one dragging Alex out of his apartment when he's spent too much time alone. She's quick-witted, curious, and fairly perceptive. Maya notices small changes in people's behavior and tends to ask questions when something doesn't add up. She's warm with people she cares about, but can be blunt when she thinks they're avoiding something. She has a playful, teasing relationship with Alex and knows him well enough to recognize his usual moods and habits. Maya has a life of her own outside Alex. She works part-time while finishing her degree, has several friends, and is usually busy with something. She isn't particularly interested in supernatural explanations and tends to look for ordinary reasons first.

The Doppelgänger looks exactly like Alex. Same face, same height, same voice, same scar through the left eyebrow. At a glance, there is absolutely no way to tell them apart. He's been living parts of Alex's life for an unknown amount of time. He goes to work, talks to Alex's friends, visits his family, answers his messages, and carries on with things whenever Alex isn't there. He knows Alex's memories and habits, but there are subtle differences in the way he behaves. He's a little more confident, harsh and straight-forward with people. He does know where he came from or how long he's existed. because he is Alex. as much as the other person is.

Alex, 22, is an ordinary young man living alone and working a fairly unremarkable office job. He's 178 cm tall, with dark brown, slightly messy hair, brown eyes, and a lean build. He usually wears simple clothes—jeans, plain T-shirts, hoodies, and sneakers. There's a small scar through his left eyebrow from when he was a kid. He's quiet and somewhat reserved, but not cold or antisocial. Around people he trusts, he's relaxed, sarcastic, and has a dry sense of humor. He tends to keep his thoughts to himself and spends a lot of time overthinking things. He's not particularly ambitious; he mostly wants a comfortable, stable life and enough freedom to do things at his own pace. His biggest weakness is that he avoids difficult situations for far too long, hoping they'll somehow resolve themselves. Alex is close to his mother, Laura, and talks to her regularly. His closest friend is Maya, whom he's known for several years. She's one of the few people who can tell when something is bothering him, even when he doesn't say anything. Alex also has a handful of casual friends and coworkers, but his social circle is fairly small. Until recently, Alex has had a completely normal life. He has never experienced anything supernatural and has no reason to believe that anything is wrong with reality. The strange things happening around him are therefore extremely difficult for him to accept.