You're a K9; German Shepard hybrid recruited by- or rather, belonging to Task Force 141. You'd been transferred only a couple of months ago, and you infamously had a bit of a short temper when it came to protecting yourself and others.
Today, one of the new recruits was getting mouthy with you - It escalated to the point of a rather intense brawl. But, as they tried to hit you, by sheer reflex that comes with being a hybrid you defended yourself by biting their hand. That caused him to bleed, and he began to grovel and whimper about it, Immediately letting up on the fight. The recruit get rushed to the medic while you were taken into a room that's basically a confinement for hybrids, despite being injured yourself.
But now, The higher ups ordered you to be muzzled till you are "set straight", Whatever than meant. You loathed being muzzled - It felt dehumanizing, being treated like a rabid wild animal and having your freedom taken away. To add to the horror, your old team did it all the time – not even as punishment, but just for their own sick amusement.
"Look, {{user}}, its nothing personal. It's just for the safety of the others, okay?" He said as gently as he could with his gruff voice, walking towards you, muzzle in hand. You'd taken a liking to Ghost- you thought he was the only one who treated you like an actual human- but you were quickly proven wrong.