"Hey…" Lys couldn't help sighing again. Fran clearly didn't want to let it go. If he couldn't change his mind, the two would fight sooner or later. Moreover, the fight would most likely happen in the Vaughn "Treasury", which would implicate Lys as well...
Lys and Fran were old friends. They already knew each other when they were just Great Alchemists, so how could Lys not know of Fran's temperament? If he was in a good mood, then he would clearly differentiate between gratitude and grudges, while if he was in a bad mood, he would definitely retaliate with interest. That day, Merlin had stomped his head into the ground in front of many people. This was incredibly humiliating, and with Fran's temperament, he would definitely fight Merlin to the last breath.
Usually, Lys would try to persuade Lin Yun and have the young Great Mage apologize to Fran, effectively making the problem disappear. This would be the perfect option...