The magnum won't be long enough for the second character, but it will be fine for the other 2. However, I DO suggest the magnum xl for the second character..Though essentually you could get the xl and cut it to fit the others..
Cosplay DA Regular DA
-Fate Testarossa (Mahou Shojo Lyrical Nanoha A's) ~90%-
-Ryouko Ookami (Ookami san and her 7 companions) ~75%
-Amy Sorel (Soul Calibur) 25%-