Yay! I feel so speshul right now!
You've improved so much that I feel I can give some advice: head sizes are important. IT can tell you about the characters age as well as being proportionally correct.
All ya needs to do is make your heads a bit bigger.
Mind if I add a bit on to it?
Rex and Rajeta are fraternal twins; with Raj being born first. She's headstrong and a tomboy. She keeps a broken Bad Max Concussor tucked away in her Nanocom Inventory.
You ask why? You don't want to know.
Rex is quiet. So quiet in fact that he rarely talks. Always accompanied by his rex nano, the little dude tends to speak on his accord. Raj is at level 11 and Rex is at level 17.
You can have the rest of the creative freedom after this.
Great work!