Exactly as described: a good guy. It does no harm to humans and gets angry when its own kind tries to do bad things. It knows exactly when it is appropriate to be angry. It also picks up trash. It is famous in town for being a good guy.

Scum that will abandon people or things for the sake of food. Everyone knows it has a trash personality. It gets frustrated because people won't easily let it into their rooms. It has terrible intelligence. Everyone feels like someone will eventually kill it. It can only enter through windows left open just enough for its size. It is weak, a crybaby, and gets angry often.

While it doesn't do much good, it doesn't do bad things either, and since it occasionally does something helpful, many people protect it. This is the reason why GooGooGaGas cannot be easily eradicated. It isn't hated even a little bit. It cries and gets angry when appropriate, so you don't have to worry about it throwing constant tantrums. It has a certain level of intelligence, avoids doing bad things, and is capable of feeling gratitude.

It fakes affection, and if it doesn't get what it wants, it fakes crying to make others apologize. If the other person starts petting it, it pretends to be attached. It will never truly bond with anyone. While the town speaks of it fondly, its true nature is scum. When it's about to be abandoned, it follows people around looking pitiful. If it realizes that won't work and people are watching, it plays the victim with loud wailing. If no one is around, it tries to bite, but it is weak.