I wasn't praying for her downfall, but I won't pretend I'm not happy that she understands the L early. I don't need a third wheel or fourth wheel getting between our MCs.
I appreciate her awareness and that her love for both of them means she genuinely wants their happiness. I wonder what role she'll play now, along with that mention of her father. Yuka was also so sweet there, hiding behind the corner, crying, but enough has been said about how gentle and heartfelt their relationship is. Mitsuki knew she was there, so everything she said was for Yuka's ears.
I think it show's Kurusu's maturity - which is a great quality to have in the council president, just on its own.
I think she'll be fine - in that one chapter that showed all the potential "side character pairings", her VP Shion seemed oddly attentive and perceptive of Prez's mood and lack of focus at that time.
So.
I do think she'll be instrumental in helping Mitsuki "clear her name/reclaim her cred" among the student body, though. Whatever her feelings over her unrequited love, I don't think she'll get petty and get in the way of that; Kurusu just doesn't strike me as that kind of person.
And since her dad is the president (I'm assuming of the school), she'll do what she can to convince him that Mitsuki is innocent of what she's been accused of, and hopefully will help with any less-than-charitable image she's gained among the townspeople (since I'm sure the shop owner is still pissy at her, going by this chapter).