Play in Practice mode to improve your band members and merge the same members together for an increase in his or her stats and improving their appearance. Note: The character will go back to level 1 but keep their current stats.
Each character has Pure, Cool and Smile stats. Various songs also have these same three types of stats. Characters with the same type of stat as the song will earn bonus points during the match. Switch characters during the song to match the stat will result in more points.