Beyond physical appearance, what other characteristics define 'monster girls' within the *Invincible* universe, and how do these characteristics influence their roles in the story?

Beyond their non-human appearances, 'monster girls' in *Invincible* are often defined by their unique cultural backgrounds, biological traits (like specific abilities or vulnerabilities), and the societal prejudices they face. These characteristics heavily influence their roles in the story, often positioning them as outsiders, victims of oppression, or individuals fighting for acceptance and equality. Their experiences contribute to the comic's exploration of complex themes related to identity, diversity, and power dynamics.