hero是可數名詞還是不可數名詞

hero用作名詞的用法例句：

The hero smote the giant with his sword.英雄用劍猛劈巨人。

He is the hero of an old legend.他是一個古老傳說中的英雄。

They say the hero is played by Tom Cruise.據說男主角是湯姆·克魯斯。