Final Jeopardy
I am a vital part of your being, yet I wear many masks.
In the human body, I am the largest internal organ, a silent chemical factory that keeps you alive.
In Dungeons & Dragons, I am a delicacy often sought by a Beholder or a Displacer Beast, but if you are a Were-creature, I am the part of the "animal" you must struggle to suppress.
In the world of SpongeBob, I am a specific type of "color" (and a "spotted" one at that) belonging to a character who is famously dim-witted and lives under a rock.
Among animals, I am what makes a cat an obligate carnivore; without the specific acids I produce to process meat, the feline hunter would wither away.
What am I?
The liver