Ohh, now they make sense. So base stats are 100 for all girls and displayed stats at the very beginning are "base*(100+modifier)%". That way we can get modifiers for each girl. I think this needs a writing down as after you train them it will be much harder to find those modifiers.
Modifiers:
Cherry: 7/7/6
Lola: ?/?/5
Sanshi: ?/5/7
Ice: 4/6/10
Geeky: 7/3/10
Dora: 6/1/13