Hirose is so relatable to me right now. When you find out your rival in love is just a better person than you, that's the type of feeling that easily leads to self-loathing. Hopefully her friends will be aware enough to help her not get there.
I also like that Hirose knows everything that is going on, as is natural for the person outside of the situation, but it's unclear how much anyone else knows. I think Takamine and Sakura are aware of their own feelings for each other, but it's certainly debatable and not clear yet, but I doubt Takamine has any idea that Hirose liked her.