Sion main.
I have a buncha characters i play on the side, but it doesnt really matter cause my main will like, always be Sion.
When i started, my list of mains went like this:
Kohaku -> Ciel -> Kohaku -> Sion -> V.Akiha -> Sion -> Kohaku -> Ciel -> Sion
and ive stuck with her since. Keep in mind i would change my main like, every week or every few days in Japan.