Yuka smiled a little at that. It'd been a long time since Cirno had called herself that... not since she had really started getting acknowledgement. Still...

"Even the Strongest should take care of herself though, right?"

She thought, but didn't add something like 'and it worries us.' She was sure it was true - she didn't know this other girl, but she seemed to care about Cirno too, which was what mattered to Yuka right now. But hearing that might just make Cirno feel worse right now.