Sentence examples for a fighter from inspiring English sources

The phrase "a fighter" is correct and usable in written English.
It can be used to describe someone who is determined, resilient, or engaged in a struggle, whether literally (like a boxer) or metaphorically (like someone facing challenges in life).
Example: "Despite the many obstacles she faced, she proved to be a fighter, never backing down from her dreams."
Alternatives: "a warrior" or "a battler".