Good work, Sora. A bump in could have happened and then Blue introducing herself since the boy is a regular face around the hospital. She would have likely told him that her mother is a doctor at the hospital, and wouldn't have minded either approaching him outside the hospital if/when she saw him around!

Congratulations would have been given to Sora the Eevee (now Sylveon) upon evolving. And to Roxas too, especially if it's known they evolve into Sylveon's due to having a close and loving bond.

Roxas could be familiar with her Pokémon, specifically a modest little Nidoran boy and an active Houndour girl. Blue probably asks him how his day/week has been when they see each other, even offer for him to get a drink together if he wants.