"Ah, this..."
Ian hadn't expected that Master Gossay would actually faint from the shock of his identity.
But upon further contemplation, it was not surprising—Master Gossay originally came on a simple royal task with his young apprentice, aiming also to protect the latter from any unwanted attention; however, he discovered that someone had already prepared to assassinate Yisen. And his former student, the uncle to his apprentice, was the mastermind behind the assassination attempt. He himself was struck and seriously injured by the man, and then he witnessed the local White Folks' young appraiser slay the Native Great Shaman with First Energy Level power...
Afterward, he fell into the ruins and deduced the true identity of the young appraiser.
All these troublesome events tied together, and with the old man's emotions deeply stirred, combined with his genuine physical weakness at the time, fainting was not odd at all.