Skyborn

In the kingdom of Airad, when youth reach their coming of age, they become one of two things: a normal, average person, or a Sentinel.
However, Sentinels are few and far between, and hardly anyone is chosen. Corin was born a castle servant, one of the lowest of the low. So when he turns eighteen, it is completely unexpected that he is chosen to become a Sentinel. It is even more unbelievable when he is chosen to be apprenticed under the legendary warrior Erebos.
While life for Corin is hard enough trying to be accepted into the order, it is about to get harder still. An army from an unknown land in strange red armor has appeared, and they are steadily taking control of Airad. It is up to the Sentinels to protect the kingdom. But how can they, when only seven members remain?

Please comment, so I know how I'm doing.