Lots and lots and lots of wierd stuff going on with that dude, Helm. The biggest thing to stick out, for me, is his ridiculously short forearms.
Ehh, I'll be specific.
Head is awesome, face is awesome, shirt and shoulders work, and the overall character is damn clear.
His left forearm is far too skinny (a bent arm would bulge at the elbow) and, as I mentioned, far too short compared to the other half of the arm and his hand. Also, the watch (or whatever it is) on that arm should defiinitely break the line of the arm to show its volume.
His right forearm is also too short, which leads me to believe it was more artistic choice than innocent mistake (Helm does not make mistakes! ever!

) in which case I entirely disagree with your artistic choice, because it's distracting as fuck

. His right hand feels massive, and aside from the impossible angle that ben mentioned, I really think it'd benefit from overlapping the other arm, to show its position in space.
Still on his right arm, just took another look and realised there's some confusion of depth. Right shoulder is behind the chest (obviously) and seems to be slanting further back in space based on how the sleeve itself is hanging forward and doesn't appear to be contacting the bicep. The elbow, however, is suggesting that the upper arm is actually slanting forward... somehow? I can't figure it out, but if I cover up the shoulder I can only see that arm slanting forward in space toward the elbow.
Hopefully someone understood that. Moving on!
His shorts seem a little stiff, and I'm not positive what they're made of, but I love the fact that it looks like he could just soil himself at any moment.
His right leg is great, except for the calf seeming a bit small and the discrepency in the boots, which is to say that his left foot's boot seems to have a wider opening than the right.
His left leg is also great, except for the whole impossible relation between the foot and the knee. The foot is turned more than 45 degrees from the knee, which.... well, try it. Ow.
That's it for the guy! As for the girl...
...love it. I greatly look forward to seeing the rest of these

(P.S. love the legs on that bot, Xion!)