To be honest, if Gauss's attributes hadn't reached an outstanding level, and he hadn't received blessings from Moterla that made him sensitive to evil powers, he might not have been able to immediately and accurately identify the aura on Fisher.
Speaking of which, he still has a mark inside him.
That was from when he hadn't yet advanced to become a Professional and was still a Bottom Adventurer.
During a cleanup of a church ratman nest, the final ratman priest chose to take his own life and, at the cost of his and his clansmen's lives, left a mark on him.
At that time, it even mentioned the existence it worshiped, Vesperilia.
He later asked Moterla for help to remove it, but unfortunately, Moterla was not skilled in such purification, so he only used some means to conceal it somewhat.
"So, is Fisher, like that ratman priest, also a minion of that mysterious existence?"
Gauss signaled the other members of the Red Dragon Team to stay away.
