Image imported from derpibooru 
Original Description:
 
So to make it easy, these are the Knights of Harmony and they identify the element they associate with in various panels:
 
From left to right:  
Ceridwen, the element of Equity  
No idea on the name of the squid/shark hybrid, but they are the element of Acceptance  
Danu (a leucrocuta), the element of Loyalty  
Balor (a dragon, though may be specific type), the element of Magic  
Taranis (a ophiotaurus), the element of Pride  
Morrigan (a bird spirit thing), the element of Faith