Shalane and Desi are polar opposites even though they are at the same stage of their careers.
Shalane is motivated and kept in the sport because she enjoys teaching/coaching her teammates.
Desi couldn't get away from her team and teammates fast enough and is motivated by training alone.
Shalane enjoys writing books.
Desi enjoys reading books.
Shalane has spent her career being the most talented athlete in the field.
Desi has spent her career being the smartest athlete in the field.
Even thei physical appearance couldn't be more different
Shalane is tall blonde and fair skinned.
Desi is short dark haired and is dark skinned.
It appears that neither of them really like each other but have learned to tolerate each other. When hearing them together I get the idea that they both have a difficult time not rolling their eyes at the other.