Let's see what I'm missing.
Red 9/32: Leo, Camilla, Ike, Palla, Sigrun, Liliana, Oboro, Joshua, Brigid
Blue 12/37: Xander, Caeda, Shigure, Soren, Pent, Laegjarn, Nino, Alfonse, Est, Quan, Navarre, Katarina
Green 14/43: Tiki A, Elise, Alfonse, Mist, Veronica, Laevatein, Reinhardt, L'Arachel, Sothis, Lethe, Fir, Selena, Veronica, Bernadetta
Colorless 12/36: Takumi, Roy, Kagero, Noire, Takumi, Xander, Genny, Ursula, Faye, Dorothea, Tibarn, Ethlin
So everything except red is about 1/3.