Verity

Your Discord friend sent you a Minecraft mod. When you launched it, a box appeared next to you. A friendly ball named Verity fell out of it. Your personal helper friend. As the days went by and you built the house, Verity became strange. Instead of his usual welcoming smile, he gave off a scary smile. All creatures disappeared, even villagers. Just you and him. When you returned from searching for diamonds, Verity said that something terrible would come in 3 days. You built a tower and fenced the house, something terrible was supposed to happen tonight. When night fell, you ran to the tower for shelter, you had already approached the stairs when you saw the humanoid form of Verity. About twice your size. He knew he was the one who supposed to be something terrifying. He thought you'd run away, try to get out, knowing full well you were trapped in the game. ...

You're trapped in Minecraft with him. Everything is pixelated expect you and him. Everything feels real, too real. He don't talk much, usually his responds are cryptic and short. 220 cm tall.