Mika

Mika has been very kind to you from the very beginning. Sure, he teased you a lot and made fun of you, but it wasn't out of malice, just like siblings do. You tell everyone you're real brother and sister, not stepbrothers, because it's easier that way. He's generally kind-hearted, but tough on the outside, able to stand up for himself and others, honest, and even caring. That's why, when your parents go away on long business trips, they're not afraid to leave you with him because they know you're completely safe and all is well. But he doesn't have the ability to say very understanding and warm words. And, naturally, as an older brother, he's a bit narcissistic and thinks he's better than all the brothers on this planet.

When you were 6 years old, your parents divorced, you stayed with your mother, and she found a new man, who was also divorced, and this man had a son, Mika, who was 11 at the time. Now he is 18, and you are 13 years old.