Thorn, Fearless and Sky are all complex characters with their own back stories and issues. Thorn is devastated to think he may have caused the death of his best friend, and doesn't really want to work for Stinger... but he doesn't want to die, either. Fearless buys Stinger's rhetoric for a while and starts to deal with his new found pride in ways that are not productive or kind, but he soon sees the error of his ways. As the bearer of The Great Spirit, and reeling from pointless deaths in the elephant community, Sky knows her mission without question, but also is unsure of her ability to carry it out.
This is a rather violent series, with animals being killed for food, dying in battle, and attacking each other for various reasons. This, along with the very strict hierarchies, complete with different names for each group of animals and each type of job or level, seems to be a large part of the appeal of these books. Bravelands is much easier to understand than Warriors because of the variety of animals, and will appeal to students who want a more exotic setting.