Someone with swordsmanship as apart of their arsenal regardless of your level of mastery, regardless of you favoring another aspect of your fighting style, or whether you care to be called one or not. If you intend to fight a serious battle with swords as apart of your kit you qualify. You can still be a swordsman without needing to be defined by it or it being your whole personality, I’m looking at you Big Mom and King, they’re still good enough to threaten serious combatants w their use of swords alone even if there are other aspects of their fighting styles that they prefer/better with.