Claymore

Synopsis

Clare comes close to awakening when she uses too much of her Yoki (demon energy) in the battle against the Yoma, the Voracious Eater. She intends to commit suicide before her awakening is complete in order to find peace through dying while she is still human, but Raki pleads and begs her not to do it, saying that him meeting her was the best thing to happen to him. His pleas halt Clares awakening transformation, and one of the two knights fighting in the battle later gives Raki a sword in appreciation for what he and Clare have done for them while the other wishes for Raki to grow strong.

(Source: Wikipedia)