Its a hard ask to pick one of them! All the story lines are great so far, even the WIPs. And I like how you really wrote the questlines so you do really care for all the gyals.
Blair is kinda bland, but as a WIP its expected. Her stories and questions are right on for what i think someone with her background would have.
Yoyo is intriguing, and i like how she was animated to show how she wasnt feeling right about things. Her warming up is a good slow burn and i cant wait to help her with the village.
Lyriel is a fleshed out and fun quest and is fun to tease. Her quest so far feels like a cliffhanger, and i wanna help her sort things out.
Cait is so much fun to play down her line, and to see her evolve. Her quest introduces alot of mystery without making her feel like shes some hidden saviour or supermage.
Naomi is awesome. I sense real experience with some of her issues in her writing and its rough seeing her do what she does. Its heart breaking to see her go as far as she did in the hallway.
Rae is just a darling, pure and simple. The way her dialogue subtly shifts to show her growing affection was natural and smooth. Her considering to break her oath in the future tells you exactly how much she has come to care for the MC without using words of emotion.
There is really no one favorite to pick, they are all just wonderful!