"You said before that this was a mistake you made with Catherine, so obviously, this person is related to Catherine," Pannis shrugged, without hesitation. "Then, from the people you know, the only one related to Catherine is her grandfather Merlin. So, the medium you chose could only be Merlin, right?"
"Hmph, if I hadn't mentioned it was about Catherine, you never would have guessed," Nellie pouted, grumbling persistently. "It was me who told you, after all. There's nothing to be proud of."
"I'm not proud," Pannis said with a laugh. "I just made a random guess, and besides, you asked me to guess."