Oni no Ou to Chigire - Chapter 2 Pg 56

Ever since that day, Yato would always sit on Tokimoris shoulder. He would also stay in his pockets, or grab onto is hair and ride on top of his head. No one in his family noticed Yato was there. As usual, they would selfishly lecture and encourage him not to fail their expectations. At those times, Tokimori could do nothing but cry, but thanks to Yato, the amount he cried decreased dramatically. Any time his family would say something to Tokimori, Yato would object with terrible force, and shout nonsense into his ear so he couldnt catch his familys words. His family mistook Tokimori crying less because of Yato as becoming stronger, so they were overjoyed, which resulted in less lectures.

Katsumoto of course noticed Yato. The first time Yato and Katsumoto came face to face, they stared at each other in silence for at least thirty seconds. They both seemed to be sizing each other up. Yato was the first to open his mouth.

Yo! You seem to be able to see me. Im Tokimoris demon. Nice to meet ya.

I am Katsumoto Yase, Tokimori-sans instructor. Pleased to make your acquaintance.

Katsumoto spoke formally, despite Yatos excessively arrogant tone.