NewRem has a lot of different kinds of monsters, and they have a lot of different properties and cultures. Monsters exist to kill humans. The game that NewRem takes place in has them as enemies to fight against and kill people. However, monsters are also programmed in such a way that leaves openings for them to learn, and assuming nothing is specified for a specific aspect of their personality, the monster is capable of becoming whatever it wants with respect to that aspect. Here are a few comics featuring monsters. You can also follow a study on one particular monster in this 24 Hour Comic.
It's like Undertale but hopeless. Anyway, back to the other comics.