Elders usually spectated the battle through tiny VIP rooms. Their presence was important, and to avoid being swarmed by tourists, they reserved rooms. The person who addressed Arthur as "Mr. Solace" was one of Gabriel's disciples.
He had long, black hair and an innocent face. With an expression of respect, he addressed Arthur as someone above him, bowing while conveying Elder Gabriel's message with the utmost respect towards the receiver.
Arthur glanced at the battlefield, then at Isabella, who nodded. The crimson-eyed man stood up, and was led towards Elder Gabriel's room by the innocent disciple, who didn't dare to gaze the crimson-eyed man in the eye.
Gabriel's disciple wasn't aware of Arthur's status in the village, and simply assumed that the latter was an esteemed guest. Moreover, Isabella–one of the founders of Gargo Village–was treating Arthur with such kindness, that Gabriel's disciples couldn't help but convert that into respect.