The Omega of the Dragon

In the story, the protagonists fight to be together, but while that happens, and the protagonist tries to avoid being the sacrifice, Beryl, the extra character, is the one who is given to the dragon as a sacrifice, so that he continues being the protector of the kingdom. But, just when Beryl is about to be the sacrifice, another soul takes his place and he is not willing to sacrifice himself for anyone, so he must find a way to save his own life, can he escape? Will he be the sacrifice?