Jing and Kir save her when she is about to be executed for being late for a meeting organized by the Master Gear, the ruler of Adonis.

Mirabelle has a kind and strong personality. She has admired Jing ever since they met, and she believed in his act of "stealing the time" from Master Gear. At the final showdown, she joins forces with Jing and the others with a Clock Shield in her hands, and saves Jing from a Master Gear's surprise attack. Later, at a celebration for Adonis' release from Master Gear, she searches for Jing over the city with a bouquet of flowers, but he has already left as usual.

The origin of her name is from fruit brandy using plums.