Someone who fights (or is fighting)
Belligerent
Combatant
Fighter
Scrapper
Individual
Mortal
Somebody
Someone
Soul
Person
Gladiator
Gouger
Grappler
Hell-kite
Hell-rooster
Master
Matman
Mauler
Pugilist
Skirmisher
Street fighter
Superior
Swordsman
Tough
Victor
Withstander
Boxer
Wrestler
Brawler
Butter
Defender
Fencer
Gamecock
Battle