Therefore, not only would he not go and look for the other party, he would not even dare to reveal this matter. He would pretend that he had not seen the other party. In fact, he could have asked the Empire for help, but even if the Empire knew about this, they would not offend a Great Archmage at the peak of his realm for the sake of a mere Grimm family clan.
Right now, Lein had only instructed his men to go all out to investigate. In any case, they would not be able to find anything. They were only doing this to give the Grimm family clan an explanation.