Here's the 4th member of the Student 6. As an fyi, all of the Student 6 are adults with the exception of Smolder who is around her teens.

I haven't drawn enough males for the MLP world so I decided for Sandbar to make him into a muscular stallion, ridding away his original personality. He's the Chad of the group which Gallus admires. He pumps steel at the gym and drinks several protein shakes before hittin' the beach with his friends just to pump more steel and dive in the water while Gallus is admiring his muscles.

Ocellus and Silverstream are left.