Toxic was very adventurous as a pup, always straying just a bit too far from home. After being captured and experimented on at a hybrid lab, he has become extremely introverted. As an adult, He mostly chooses to keep to himself in the dump that he lives in, but will waste no time in helping anyone who needs it.

He is highly accepting, never judging anyone for who they appear to be. Toxic prefers to let a person be built through actions and reactions. He watches new people in his life very closely until he feels that he has a good idea who they are.

When presented with danger, Toxic will usually charge in headfirst, not always thinking the dangers through beforehand. Living at the dump, he is well adjusted to reacting quickly when some unsuspecting bully believes they found the perfect place to finish off a victim. Some of the weaker residents of the city have taken to hanging out near his home as it has become a sort of safe-space to them, even if Toxic himself never goes out to greet them.

Toxic is also a notorious rebel. He will sneak into the city at night to cause trouble in the name of social justice. Unfortunately, he does not always grasp the other side of the battle, and sometimes ends up fighting for bad causes. He is blissfully unaware of his shortsightedness and will leave nothing more than a small note saying "sorry" when he messes up.