Hello!
I think your characters have distinct personalities. The colors help distinguish them better, too.
For things to improve on:
- Improve on your technical skills overall. Axelle's right hand (our left) position bothers me so much.
- Consistency. When putting up a spreadsheet, consider lining up the front/back/side views together. Right now they don't feel coherent.
- Better presentation. A good character sheet also means good presentation. Axelle looks as if he's squished together inside a page! Poor thing. And the text.... the text is hard to read. Consider using an actual font, not handwriting.
Overall good start, I like the colors and energy. I would suggest you clean up some more, and improve on the art. Look up some character spreadsheet online so you can get a better idea of what to do. I know character spreadsheets don't get shown most of the time, but the less chaotic reference you have to go through, the quicker your actual comic-making will be!
Good luck and have fun!