Control the Beast! My Pet Animal Painting Style Doesn't Seem Right?

Jiang Li traveled through time to a world where everyone controlled beasts, and became the top student in the bottom-ranked middle school. How come someone else has awakened independently and contracted a dragon and phoenix, but when they come to her, they become a lustful hamster with a soft and cute appearance but a rough heart? At first he thought it was just an accident, but as the number of pets increased, Jiang Li was shocked to find out. Why is my contracted pet different from others?