Chatterbox: Inkwell

Hello everyone, it has been a very long time since I have been on the Chatterbox. 2 or more years, I think. Anyways, I am back once again in need of suggestions for writing.

I am working on a new book which will most likely be called The End's War. The basic storyline for this book is based around a corrupt government in 2040. The US government is taking teens from ages 12-18 that they believe are intelligent, strong, and even mentally unstable. They then take these kids - half a million - and put them in the Academy. This academy puts the teens in separate Sectors depending on skills, and they are raised as an army. But, there is a catch that few people know of. Some teens are going missing. The reality why is because they are doing human experiments, trying to Soul Bind teens inanimate objects, creating an immortal army. When one kid figures the base of this out, he attempts "murder" of another sector member, to be put on trial. This way he can go against the government and Academy on what he has discovered. A friend of this student defends him during the trial, and is discovered missing the next day - to be tested on for the Soul Binding practices.

This is the basis of the story, but I am stuck. I have 4 main characters, and I am only on chapter 2 so far. But for later on I want more characters with deeper personalities, some hardened by the Academy's ways, some still new. Does anyone have good names and personalities? So far there is for names: William (Will), Cassandra (Cass), Lee, and Peter.

Thanks everyone!