How does the game choose your main?

i mean like in this picture:

http://i.imgur.com/pEYDodC.jpg

is it by the amount of games you played?
and what if you never played?

It probably takes the character where you have the highest amount of points and the best grades for that ‘offense, defese, technical’ thing overall, to determine who your best character is.

Doesn’t work like that for me, it’s probably your most used character.

In other games it’s whoever you use the most. Whether or not that includes arcade mode and training mode, and whether it applies here, I don’t know.

seems not to be the case. my main is zangief and I played him by far the most but yet the game sets my main to cody which I only played for 2 weeks now.