'My word is law.'
Frankly, Tyler had only said those words in a joking fashion. However, he was now fully aware of how the residents in the castle saw him. After all, the Boundless Void Library said he had the demon's king seed inside him sounded a lot dirtier than it needed to be.
To be honest, the only reason he barely had any reaction to that information when he heard it was partly because he had predicted it in the back of his mind and he was just filled with excitement on returning to the wondrous Magic Library.
There was also the fact that the demon king's last name was being attached to his. Even if he was dense, there's no way he wouldn't put the pieces together after all that. He had already figured out the fact that he had been summoned to this word by the effects of a failed summing spell.