Cayden saw the calm expression in Arianna's face and he frowned, after having attended classes with her for one year he already had a profile of her in his mind, unlike what one might believe, the tower-like guy from the werebear race wasn't a musclehead.
That's why he got the family to support him, unlike his peers who only worried about strength, Cayden knew that information and strategy was also important.
So, he has been feigning to be a muscle head for about one year waiting for the moment when something worth of blowing up his cover appears.
And now with the exploration at the doorstep it was do or die, but then just when he believed to have understood his classmates perfectly, Arianna which used to occupy the third rank in the class without showing any sings of wanting to fight for higher ranks, suddenly challenged the second ranked in private and by the words of it, she won.