Asher has always been receptive to violence. If he sees, hears, or receives it, he responds in less than a second. So when he heard a raccoon shoot a gun (why does it even have one?), he was instantly triggered.
And then Slurpy-sound-bone-crack guy lashed out, and Asher was forced to protect the little bandits, glitching to their location, and by the time he realised he was there, he was face to face with the demon. One was already dead. He wouldn't let the other one die.
Hearing Loki's words, he couldn't help but be infuriated. Those words...Those were the words that killed his family and spared him. He almost wanted to kill the other Raccoon himself. Instead. he turned to Loki.
You...bastard...I'll kill you myself. i don't care if it was "Justice". I'LL KILL YOU MYSELF. His form started glitching uncontrollably. He throws a fireball at Loki.