UH
Ihwa is pretty skilled. She's able to impress heroes from hundreds of years ago who are also war veterans that fought in a massive long-stretched battle between the Hero Clan and Nera, with these heroes being war veterans with skills that go unfathomably above the rest, with several Heroes like Grayman and Claymore also possessing extensive combat knowledge, especially Claymore, who Ihwa herself acknowledged as an exceptionally skilled fighter even without his gift that she had to use tricks to defeat. People like Engen who can stomp people like Chaos who has analytical prediction via busted retrocognition also recognize her combat skill and potential, and she was taught how to fight by Yushin, a former Hero Clan elder who was able to fight against Victoria, whose above Engen in skill, and Yushin even acknowledged that Ihwa could potentially defeat Engen if he wasn't careful in the future.
Sorry if this is incoherent.