Again, I can't stress this enough, Ian is going through that transformation and it's mostly internal. She isn't picking up on it. Right now, according to everything laid out, it's Vicky and Ian. What a lot of people are doing is pushing a forced parallel in the story. They WANT Ian to do X and other characters and trying to justify it. As far as I've seen, Hana and Mina have reasons not to get with Ian for the time being and it requires a good amount of writing to make that line up for what people want in an alteration on their core characters at this time.