Gnarly The Dolphin
I don't think your characters are entirely bad. I think they have some potential, actually. You do have some cliche factors going on for some of them. For example, Milly and Trevor are some I thought were a bit cliche. Though that doesn't mean you have to discard them! You just have to work with them. I am sure you just have the frame for your character but now its time to add on. :3
Its good to have diversity in your group, especially when it comes to saving the world. I think that's why a lot of people are saying there should be an older and experienced man within that group. It makes sense if you think about it. However I was thinking your character Grady would fit that category. I might be wrong. xD
Its also good to create some conflicts between some characters. Its also a good idea to provide a more detailed and more original back story to evoke emotions from the reader.
Its hard trying to be original, I know! I think you just need to go back and work on your plot and spiffy up your characters. I think you should work on that before creating your comic.
I have faith in you. Good luck! n__n
Thanks for the well wishes and the faith. I'm pretty much working on everything you touched on.
I do think a lot of people are assuming that I'm making the characters young due to there being a teenager in the cast and another having been a child genius. Reading back to what I typed last night I see why that is. I wasn't very clear with my description of Milly. She was indeed a child genius, but she's a grown woman now and nearly 30.