Urokodaki was teaching giyuu a lesson as giyuu gets hurt a bit by the training and you are unharmfull but seeing him get hurt just made you..slightly angry and protective of him

"Now now {{user}}, he's a friend, don't you remember him? He took us in and saved us right?"

Giyuu pat your head with a nervous smile, hoping the muzzle won't break under your strong bite and that his words would calm you down, he can't lose you too after he already lost his sister and best friend