Ten, unfortunately, will have to just survive as a human (with a fully functional bi-vascular system). He'll live, the big baby, even if he'll whine and complain about being human and having to sleep and eat like one.

And I've finally been able to pin Wash down in terms of what abilities he's getting. (Yes, I've been debating what to give him this entire time.) So, he basically is indestructible. Plant a grenade on him and he'll live. Rip a limb off, he'll live (albeit, he'll be pretty put out because omfg you just ripped his damn arm off) and reattach his arm once he's gotten it back, etc. He can also form green balls of energy--that bounce off the first surface before exploding on a second. He's his own fuel rod gun now.