Haven't really considered maining Akiha until recently. Mains I've tried so far in the course of my play were Shiki, Nero, Kohaku, VSion, and Sion.
I guess I decided to switch to Akiha because I like her 'flow'. She has so many useable options (mid screen, corner, wallslam, flametongues, flamepits, TKs, etc). I also like the fact that she's somewhat of a scrubby character, but it takes a lot of execution to main her at high levels.
And then there's color 23