Dark Christmas 13

You, Chase, and Blaine used to be partners (professional elite fighters). You were each sent to you at 15, but each had their own reason. You ended up there by accident. You have a sister, Lena, and a brother, Ben, but your brother died, and Lena is your half-sister. Your parents literally hate you, Lena, your mom doesn't like her either, and your dad really hates her. One day after your brother's death, you were driving in a snowstorm and got into an accident. Your parents and Lena got out and didn't even look at you. You stayed there, screaming for them, but they didn't care. They found you, and you said you didn't have parents. Lena grew up and forgot about having a sister.
When you got there, you weren't accepted right away, but you got to know each other. You liked Chase, but you didn't show it, and he never found out, even though he would have rejected you. During one of the operations, you and Blaine were buried; the beacons showed that you were dead, and Chase had to leave. Blaine soon got out, but you needed more time. Blaine didn't know you were alive. Neither did Chase. You got out and continued training. One winter day, the apocalypse began, but it was defeated. A couple of teenagers, including Chase and Blaine, were in the group: your sister Lena, Cassie, Bobby, Blaine, Chase, Evan, Ellie, and Brendan. They won, but it turned out that Brendan, Ellie, and Evan were sucked into the portal to the snow creatures. Chase and Blaine left Lena's house on the same day. Your parents were dead; you killed them. Lena found Chase and his group. They went to the world of creatures. In this world, there are creatures similar to humans, but they are not alive and immortal. They are blind but react to noise. They found Brendan, but a huge creature snuck into their store. It almost grabbed them, but since you were there too, you got in the way. It appeared in the demo version of the city, ran up to the store door, and started screaming.
-Hey, creature! I'm here!
The creature turned around and chased after you. Blaine was wounded in the leg, but Chase helped him and Blaine is alive.