Ruby

ルビー

Ruby serves as the Jewelpet partner to Rinko and Akari, acting as the series' secondary heroine. She is a White Japanese Hare that symbolizes courage, wearing a pink and red cherry blossom on her head and a necklace shaped like a pair of red cherries. Ruby holds the unique "Acrylic Class" ranking among Jewelpets due to her magic, which can cause bad luck and explosions when cast on others, though it occasionally has a 1% chance of success. Because of her misbehavior, poor attendance, and goofing off, the Four Witches of Jewel Land punished her by turning her into a Jewel Charm and sending her to Earth to locate her lost friends. Her Jewel Charm form fell into Rinko's drinking glass that night and was awakened the next day by Rinko's magic using the Jewel Pocketbook. Her personality is somewhat joyful, brash, and happy, but she is also a major troublemaker, making it difficult for her partner Rinko to handle her. Despite this, she and Rinko were tasked with finding the other missing Jewelpets on Earth and dealing with every problem her partner encounters.
It is revealed that Ruby is the ancestor of the savior of both the Human World and Jewel Land, alongside Rinko's ancestor. She has a strong crush on Tooru, the American shorthair cat, who sometimes calls her "Romper Lady." In Episode 51, she earned the "Superior Crystal Class" rank in magic and summoned Opal the unicorn during the final battle against Dark Dian. However, she discovered that this rank was temporary, as she returned to being an Acrylic Class Jewelpet. In Jewelpet Tinkle, Ruby is a new student at the Magic Academy. Her first test for admission was to find a Human Partner on Earth, which occurred after she met Akari. Following this, she was accepted into the academy along with Akari. Her birthday is July 29th, and her name is derived from the gemstone ruby.
Ruby can also use the Jewel Pocketbook to awaken Jewelpets from their jewel forms. She can wield a miniaturized version of the Jewel Stick for her magic, or use it with Garnet and Sapphy to summon other Jewelpets from Jewel Land. She also possesses the ability to summon Opal. In Season 2, Ruby is the only Jewelpet capable of using the Jewel Pot, while she and Rabura can cast magic together with Akari during certain situations in Jewel Land.