I wish they'd buff the standard banner characters too, but I guess they are the most unlikely ones as they'd rather buff those that people paid money for.

At this point in time, I'm thinking about M2 Yi Xuan.
Not sure yet.
I have more than 400 pulls.

The girl looks hot and has great VAs.
Her Special W-Engine effect looks gorgeous too. She reminds me of Ningguang (just much better because Genshin characters really don't look great in hindsight)