Yeah, I am getting that feeling a little. But hey, it could be much worse. We could have a case of Superman and Batman Jr.

However, while the characters with their abilities are similar, I do think that they are still very much so their own characters. Ryan left his parents and home to train and become stronger after a humiliating solo mission, and Dreda follows the winds, using their guidance to push herself forward. From what I've gotten from your characters, they are WAAAAAY their own. Kenji, while similar to Star, I can see growing into something very different. Rune seems to be made a cyborg out of necessity, possibly from WW3 or it's aftermath, rather than a choice.