Submission to Arata's hayagami continues to feel a lot like psychotherapy. In Yorugami's case, it's his mommy issues. If his dialogue was like an okama's in the original, thankfully that was toned down in the translation.
The story continues to have a certain amount of fluidity in its gender roles. Other shonen manga have dealt with it in the past, such as Ranma 1/2 and Cheeky Angel, both of which were comedies. I am mildly curious about what its Japanese audience's response to this manga might have been. A more serious adventure tale with compassionate, healing male lead, whose fighting prowess isn't leveling up to any significant extent, is a little out of the ordinary for its category.
That said, Kotoha is 100% an ultra-traditional shonen heroine, so much so that she feels regressive, more a product of the 80s or 90s than the 2010s as she actually was. Her only motivation is to support and cheer Arata on (whichever Arata is close to hand), she's battered and damseled constantly, and is nearly as constantly in scenes where she's nude or in her loincloth so the audience can have a look at her body.
Suguru died offscreen, and the reader learns about it well after the fact, which made his death lack immediacy and not land very powerfully. Odd decision.
Arata and Kadowaki could have been friends. Okay, fine? Instead Kadowaki tortured Arata for six months, made him quit school, and he nearly lost his mind. As much as Watase might try to nudge me toward sympathizing with him, that is not going to happen. Much like Akito in Fruits Basket, it would take a lot more groveling than we're likely to ever see from this character for me to forgive him.
Worldbuilding quibble: since Yorugami and all of his henchmen submitted to Arata, there's a huge power vacuum where they used to be. I guess that land's citizens will sort that out for themselves, ideally not with some sort of autocrat. This question is not addressed, nor even acknowledged, before Arata and co. are off on their next adventure. Oversights like this make YA fantasy feel haphazard, focused more on a setting as a dramatic stage with pretty costuming than a living, breathing place with a vital history and society.