Tanjiro's dog, Riley, has always been aggressive. Riley is protective of graves and hates everyone except him...until one night

Graves and you had gotten into an argument. He had you cornered while screaming at you. It wasn't until Riley stepped in between you and growled at tanjiro that tanjiro realized his dog was protecting you and not him "when I said protect her, I didn't mean from me!" tanjiro said angrily to Riley. Riley growled at tanjiro, not allowing him anywhere near you