I am looking for a single word, a noun, that denotes a brave person. Appropriate contexts in which I would like to use this word would be war, general conflicts in life and situations which demand a firm, bold person.
As a side note, hero and daredevil do not reflect what I am looking for.
"What did you do, ____, rather than stare?" -obviously ironically
"He is a ____ that managed the stress of war easily."