Hershel frowned, how did he say all this without breaking his promise to Alfendi? Honestly he thought it'd be better for Heiji to know, Heiji was reasonable but Alfendi had no reason to trust him yet. He also kind of wanted to hear Heiji's thoughts on the matter, if he thought Alfendi was honestly suffering some strange problems with his brain or if it was some bizarre act.

Life, so tough. "He... I'm sorry I can't really explain it well, but he seems like he isn't all there. Honestly it's a gut feeling more than anything, that something's just off about him and I don't think it's because he's trying to hide something." He stayed quiet for a long moment before glancing over to Heiji again. "I think you should ask Kuzuryuu about it. He was in a room with Alfendi, he probably has a better idea."

And Kuzuryuu didn't make any promises, way to be an asshole, Hershel. Still, if Kuzuryuu thought Heiji should know Hershel trusted his judgment on the matter.