Nice rendering of the armor, I love the first one...
Those a great sketches, but I find the Defender design itself rather uninspired. 
You have shined this particular turd about as great as it can be, though! I hope that's some consolation so I don't sound like I'm a [censored] ragging on your art.
Great work!
I posted these on the champions forums...but its still really early for much of a community there....so im posted them here too!
Here are two sketches of the main character "The Defender"
Defender Sketch 1
Defender Sketch 2
Mew