For me, Saybee went down my list.

I prefer girls who aren't confident, but still try their best.
Which is why Aarii went up for me. She knows she sucks at singing, I'm positive she sings better than Sayumin when she joined, but she still does an awesome job in Ju=Ju regardless of line distribution.
I guess since I can indirectly motive girls if they aren't confident more than those who are.