Gluko is a supporting character who serves as one of the two female lackeys to Prince Eccentro, the primary antagonist. She is a young woman with a notably curvaceous figure, purple eyes, and long purple hair that reaches past her hips. Her typical accessory is a pair of glasses, and she is almost always seen carrying a book that contains detailed information about the creatures and magical world they explore.

Personality-wise, Gluko is best described as friendly and air-headed. She is not very intelligent and often says things that lack clear meaning or asks long, logic-based questions that tend to confuse or bore her teammates. Despite working for the villainous Prince Eccentro, her personality lacks genuine malice. She does not seem particularly evil or cruel compared to other antagonists, and she often finds amusement and entertainment in the events unfolding around her. A defining character trait is her incredible and almost creepy amount of good luck. In situations where her comrades face punishment or physical harm, Gluko is consistently spared and emerges without injury.

Glukos primary role within Prince Eccentros team is as a source of information. She relies on the book she carries to provide details on the various monsters and magical phenomena the group encounters in Mon World. She also possesses the ability to read ancient languages, making her uniquely useful for deciphering clues or instructions related to their schemes. Her motivation is not driven by a deep desire for power or conquest like her leader, but rather she seems content to simply follow along with the teams plans and enjoy the adventure. Her speech patterns are distinct; in the Japanese version of the series, she speaks in a very polite and respectful manner, regardless of whether she is addressing her allies or her enemies.

In terms of relationships, Gluko works directly under Prince Eccentro alongside her female partner, Batch. While Batch is portrayed as more tomboyish, clever, and vicious, Gluko is the air-headed counterpart. They share the common goal of assisting Eccentro in his quest to gather monster items and dominate both Earth and Mon World. One of the most significant relationships Gluko develops is with a creature she later adopts as a pet, a cheerful young Forest Imp named Impy. She finds Impy in a forest, and the small creature becomes a constant companion, often repeating what she says in a cheerful manner.

Gluko shows a small degree of development through her adoption of Impy, transitioning from simply a minion to a caretaker figure. Impy possesses psychic powers that can be used to move objects telekinetically, which occasionally aids in Eccentros plans, although the creatures habit of fiddling with buttons also frequently leads to unintended and explosive results for the team. As for notable abilities, beyond her specialized knowledge of monsters and ancient texts, Gluko does not demonstrate significant combat skills or magical powers. Her most remarkable ability is arguably her supernatural luck, which consistently protects her from the slapstick violence and consequences that regularly befall Prince Eccentro, Batch, and even the heroic Mon Colle Knights.