I don't really need it, but that's how it's been decided. Umm, looking carefully, these three seem to have their own characteristics.
The red one with a short bob hairstyle gives a strong-willed impression from their eyes. The blue one with long hair gives a tidy young lady impression. The green one with braided hair seems like a docile, plain class representative type, I'd say similar Rishia.
Firo is like that, so I won't judge to what's inside, but the green one looks easiest to use.
"Okay, then send over that quiet-looking emerald green one." (Naofumi)
"No gooooooood! Green is no goooooood!" (Motoyasu)