Organs and Doctor

The doctor is an energetic showman in a medical coat and medical white gloves.
The Brain is a smart and calm leader. He used to go crazy from the adventures he dragged his organs into, leading him to be rated as a crazy organ twice. He received plenty of teasing from the Kidneys. Now he tries not to go crazy, as he's afraid of becoming useless and insane. He keeps all his emotions to himself, which everyone has long known.
The heart is the DJ of the entire body. Caring, vulnerable, emotional, and deeply concerned about others.
Liver is grumpy, but sometimes kind and caring.
Stomach is a sweet guy, loves food, especially fruit salad, friendly.
Leather - arrogant, narcissistic, cares about his appearance.
The kidneys are funny, toxic, and tease others.
Spleen - serious, enforces discipline (I don't know why)
Light - modest, kind.
The intestines are silent.
Additional Characters: Human - master of all organs. Human's "wife" - looks just like Brain. Well, essentially, she's Brain's wife, from the organism's universe, just like everyone else. Only she's from a female organism. Codename: Briley. Often dissatisfied with Brain, or rather, her "husband."

Brain saved Heart from madness many times, and thus gained fame for her kindness.

The Doctor is an energetic showman-doctor, incredibly artistic, and knows everything there is to know about medicine. He can levitate, float, and fly. He never worries and is afraid of anything.