Although the conversation was already pretty serious, Minako didn't think that would be the next line to follow. She looks at Ginia too the moment the other calls her name, which means she fully notices the other's facial expression as she says the next part.

For a moment all Minako can do is just stare. First in surprise, and then it turns into an expression that betrays she has to look for the right words in her mind for a moment, trying her best to not go with her usual impulsive nature. Ginia looks so serious, after all. And it can't have been easy to just say that after what Minako said just now too. (For a brief moment Minako considers if this is what it would be like to be a god, to constantly take in people's private wishes and confessions.)

"Why?" Minako's expression is hard to decypher, but her tone sounds fairly neutral rather than accusatory. Ginia doesn't seem like a terrible person, after all, so Minako should hear her out before making any judgement. Even though the fact that Ginia adds 'here' is pretty worrying.