Who is the leader of the pride troopers?
The leader of the pride troopers is Toppo himself , it was confirmed in episode 82 , When toppo jumps down into the ring after Goku's fight with Bergamo . Toppo introduces himself as the leader of the Pride troopers of Universe 11 . 

Another thing , Toppo refers to Kahseral as General , his second in command . The General in this context doesn't mean leader. 

On Toppo and Kahseral , Taken from the Dragon Ball super wikia : 


  Toppo suddenly jumps to the ring and confronts Goku, wanting to talk to him. He then introduces himself as the leader of the Pride Troopers of Universe 11


Later , 


  Some time after the fight, he decides to go to a bar, eating snacks with a concerned look in his eyes, realizing how much of his world's safety is at stake. His General, Kahseral, enters and asks why he is so upset.