Oh god, this is gorgeous... LOVE Ratchet!! Makes me think of episode 22, I just watched it a couple of days ago! That episode was a powerful one indeed, and in several ways, too.
I like how the darker neutral background brings out Ratchet's brighter color scheme (or "paint job", of you will ^^), though I also like how some of him is shrouded in shadow as well. Very fitting for this. And I love how he looks like he has conflicted feelings, wondering if he's doing the right thing to help his dear friends and comrades... or if what he will do will lead him astray.
Stunning work! Love it. He even almost has a majestic quality here.