Juansmarts said: Is there any meaning behind the other name that each girl is given?
Those are the original Japanese names of the ghosts. Oikake = 追いかけ = Chaser Machibuse = 待ち伏せ = Ambusher Kimagure = 気まぐれ = Whimsical Otoboke = お惚け = Playing Dumb
Y'know, all things considered and ignoring colors, shouldn't Sayaka be the "Otoboke" one? Think about it...
Ambusher "Speedy" in English-language Pac-ManPlaying dumb "Pokey" in English-language Pac-ManChaser "Shadow" in English-language Pac-ManWhimsical "Bashful" in English-language Pac-Man.