Travis was fanboying over Rebecca that he did not notice the growing grimness of his charge. Although he did not, Leila and her group certainly didn't. They are too bored to hear about the apparent accomplishment of their teacher.
Because in the minds of the students in Ec1 Comprehensive Junior High, Rebecca is their strict and unforgiving teacher. She is nothing else other than that to them as far as they are concerned. Unless they could exploit the knowledge, they are certain not to be awestruck over her past accomplishments. After all, they are confident to be more than her some time in the future.
Khelly took the chance to sneer at the other group as she no longer broke their pride with words alone. Somehow she is gloating to the fact that those brats cannot do anything outwardly hostile now. Should they do, she is going to pull Rebecca and they are definitely shivering chickens. She is not letting this advantage be wasted for some honor or whatever.
