
There are 2 club in the school, one was for rich student, basically Chaebol; and the other one is for the poor that have nothing but their brute strengths. The blue haired gurl belong to the second group, while the blondie was from the Chaebol group. Both group aren't in a good term. But the blue haired joined blondie because both group need truce, it's like exchange team member or something. If this blue haired girl decided to smash that blondie, she could get kicked out since the blondie's father is the principal/school higher up if I remember correctly, and she could get in trouble with both group as she is the one who broke the truce as "an outsider". Also, I believe that blondie was secretly psycho too, she is probably hiding her strengths because she is thought it's unnecessary to use her strengths for a mere ants.
Like seriously, blue haired girl could just smash that blonde queen bee. Why does she act all high and mighty even tho she's a weakling? I guess she has money but gosh it's always the same damn rich queen bee, it's boring and doesn't make sense