You Can covers the more you use the person
there 13 covers say take max rank and .divide by rank
Level 3 goes up to 166 so every 12 levels you would earn a cover
level 12 one green
level 24 one red
level 36 one bue
level 48 2nd green
level 60 2nd red
level 72 2 bue
level 84 3rd red
ECT ECT ECT
the more you play the more the person would gain EXP and move up ranks..