Hmm yeah, I agree with you on that too. If that were me, I'd prolly also avoid people who are mean to my friends, even if they never did anything bad to me or were nice to me. The fact that they can be mean, worse a bully, to other people just isn't a very likable thing for me.
But that's also what Sol is trying to do, avoiding Ayeon as much as she can for So-I's sake, but her own emotions are betraying her, thinking of the other person being so caring and thoughtful of her, to the point that she's the first person who comes to her mind in a difficult situation. I don't know if it's Ayeon's manipulation or what, but Sol's just too pure for her own good. Anywaayy, it's just getting very complicated now

My poor baby Sol. She's being pulled in every direction, both So-I and Ayeon are holding her back, leaving her torn as if she's responsible for fixing their lives. She's just that genuinely kind-hearted girl.
She already has so much to worry about in her own life, yet it's always about So-I or Ayeon, never about Sol. They expect so much from her, like So-I hopes she'll be nothing like Jiwon and that she'd choose her always, while Ayeon expects her to stay by her side no matter what and always understand her misery.
It's true, bruhh. Sol is nobody's savior. She herself needs saving. I just hope you girls grow up. TwT
[Also, I'm expecting a looott from Ayeon, but bruh I'm having doubts that she's beyond saving. She's making another HUGE lie, but I still have some space left to trying to understand her though. But still, this time is just SO bad]