That wasn't actually what Mob meant, but he kept his mouth shut all the same.

As Mob prepared the tea, he listened to Reigen's music, surprised that his master was capable of making music like this. He didn't know why, but he never expected that Reigen would know how to play any instruments. Now that Mob thought about it, there wasn't a lot he knew about Master Reigen at all.

"The tea's ready," Mob said once Reigen's music stopped. He poured the hot tea into a glass for his master, just as he did back in the office. Only now he was pouring from a sentient tea kettle.