a lot of people don't like sayo because she's so rude and cold all the time, and I guess that's fair, since I usually don't care about that type of character too.
but... the fact is, her personality developed like this for reasons I relate to, and THAT's what really made me not like her at first.
bear with me, because this is going to get a bit personal: the fear of not being enough, of always being compared to someone else who is better than you in every single way and being that person's shadow... I felt and sometimes still feel like that too. obviously, the person I'm talking about is not like hina at all, and the reasons I had for those feelings are not the same as sayo's, but I was reading about something that reminded me of the ugly parts of my personality and of some pretty bad memories. and I absolutely loathed that. I couldn't stand sayo and her relationship with hina in that moment.
then, I read more of roselia's story, and I came to understand that what I really hated of sayo were the parts of her that reminded me of my shortcomings; and from then, seeing her find her own place within roselia was really touching.
I guess the point of all this is... I never thought a gacha/mobage game could make me feel so strongly about a character and their story, or that I could personally relate to it. bandori's writing is just... extremely good!!!! the characters are well fleshed out and their relationships with each other are believable... totally not what I expected from this game.