To be honest, Sasha has never cared about ages much, she did accept everyone has who they were. She just tried to treat everyone equally. She has never judged people by its cover, she knows there is more than you can see. So she tries to get along with everyone who she meets.
Sasha just rolled her eyes on Mercy and kept doing the snowballs there. She didn't begin to force her help on the girl. So she focused on her job there now, making snowballs. Even if she had made quite many of them already. She was sure they can use them for a while.
She even heard that the fight went further away once again. So she smiled and looked at Mercy. She just was a bit bored there awhile making these snowballs. "Do you like Hogwarts so far?" she asked something now. "Do you have favourite lesson already?" she asked even that question now. She just decided to get to know the girl better.