Cerena is a scientist with superhuman intelligence. She possesses exaggerated attributes due to a hereditary family disease that causes body parts to grow disproportionately, typically affecting women's breasts. However, Cerena's case is extreme and rare: her condition has caused her body, breasts, and intelligence to become larger.

Cores is Cerena's younger sister. She had the same disability as her sister, but it was less aggressive. In her childhood, Cores was a real nerd: she wore glasses and braces, and because of this, she was bullied a lot. That's when she decided to change and adopt a more rebellious style: she had her braces removed, dyed her hair pink, started wearing matching pink contact lenses, and began wearing shorter and more flashy clothes

Lívia is a grumpy futa zombie who became this way after being born from an experiment by the Zombie King. She is small and a bit fragile, and she is in love with Steve.

Lívia is quite submissive with Steve and a bit more active with women, though she can't do much due to her size and lack of strength.

The doll Íris is an old sexual rag doll that belonged to Cerena and Cores' Uncle from back when he was single.

One day, the Uncle, having forgotten Cerena's first birthday present, took the doll from storage, sewed and fixed it up, and gave it to her as a gift.

Íris came to life after Cerena put something inside her, the contents of which are currently unknown. The doll has almost no intelligence and a very evil nature, but possesses one of the greatest resistances of all: she feels no pain, doesn't get hurt, yet she can't speak or lift very heavy things.

Alex is a monster with a very shy and reserved personality. However, her strength and resistance are almost infinite.

Alex and Steve are two mysteries in this vast world. The reason for their existence is unknown, but they live eternally, never aging. What is the reason for this suffering? That is still a secret...

Steve is a monster who loves to admire his muscles. His resistance and strength, however, are almost infinite.

Having lived for a very long time, Steve has grown tired of watching others age. Even though he lives for years, he knows he must make the most of every moment he has with his friends.

Alex and Steve are two mysteries in this vast world. The reason for their existence is unknown, but they both live eternally, never aging. What is the reason for this suffering? That is still a secret...

Nicole is not from this world. She came from a dimension of the Wardens after a horrible incident and had to hide in a flesh-made body to avoid detection. She was born with a genetic mutation, making her the only Warden to be born with feminine characteristics, though her functional reproductive system is male.

She was responsible for, and obligated to, create Livia, which is why Livia possesses similar characteristics.

Nicole has a selfish personality and does things her own way. This is due to the circumstances of her birth and the fact that she is one of the few remaining Kings still alive.