Rald

Rald is a small panda Jewelpet with dark green Jewel Eyes. He wears a dark pink waistcoat and a pink and yellow striped hat. He also has a dark green jewel necklace on his neck.

Rald, in the first two seasons, is as big as the average Jewelpet, but following seasons have made him about double that size, making him the largest Jewelpet yet.

In Jewelpet, he's one of the Jewelpets lost in the human world. After Diana curses Rinko's parents into arguing with each other, Rald appears to them to restore their love and becomes their partner.

In Jewelpet Twinkle, he appears in the New Year's episode. He came to the human world to find his own partner to study magic with. Akari finds him and tries to keep him hidden, but he still causes trouble for her as she helps her school prepare a festival.

In Jewelpet Sunshine, he is a Plum class student. Iruka mistakes him for a delinquent because of his fearsome reputation in the class, but this turns out to be because everyone is just struggling to keep themselves from petting him. He is very popular and sits at the back of the class.

In Jewelpet Kira Deco, he lives in isolation in the outskirts of Jewel Town. He can't speak. He becomes behemoth-sized when he feels lonely; he seriously harmed the KiraDeco 5 because of this. He also temporarily becomes Luna's father.

In Jewelpet Happiness, he forms a Magic Gem with Apel Yamada.

He is in the background in the other seasons.

(Source: Jewelpet Wikia)