Misha indeed realized that what he did in the past was a mistake and now he wanted to make amends for it, only, he didn't know how to do it and he still didn't understand how fucked up what he had done to Kia was.
Especially the life she had to live after that together with Mika.
It was true that Misha was here trying to make amends, but he approached them without understanding how much pain he had caused Kia first and it resulted in him ending up with a wrong start.
"We don't know what Mika wants, do we? So, why don't we just ask her?" Misha said. He looked at Kia calmly. "If she wants to look at her new room filled with toys or not."
Misha shuddered slightly when he saw how cold Kia looked when she glared at him in response, but then he turned his attention to Mika, because he knew the way he was doing this was wrong.