TV-Series
Description
The character known as Heavy Metal, whose name is also rendered as Heavy Meta-Ko, is a small, yellow, snake-like robot who serves as an advisor and companion to the antagonist-turned-ally Da Cider. His physical form is notably compact, and he is often seen residing within the shoulder pads of Da Cider's outfit, from where he observes the events around him.

Heavy Metal possesses a distinct and unwavering personality, primarily defined by his deep, romantic affection for his master, Da Cider. This devotion is a core aspect of his character, motivating many of his actions and his loyalty. In his role as a support unit, Heavy Metal is not merely a passive observer but possesses a crucial mechanical function. He has the ability to summon a powerful guardian knight named Queen Cideron. This summoning is triggered specifically when Da Cider plays a snake-charming flute, showcasing the partnership and reliance between the two characters. This ability makes Heavy Metal an invaluable asset in combat situations, directly contributing to Da Cider's effectiveness in battle.

The relationship between Heavy Metal and Da Cider is the most significant and defining connection for the character. Heavy Metal’s unrequited love for his master is a consistent source of comedy and motivation, setting him apart from other advisor robots in the series, such as the protagonist Ramune's companion, Tama-Q. While other characters may have personal ambitions or conflicting loyalties, Heavy Metal's commitment to Da Cider remains largely steadfast. He follows Da Cider through the latter's transition from a minion of the primary antagonist Don Harumage to becoming an ally of the heroes, indicating that his loyalty is to the person of Da Cider rather than to any particular cause or villainous ideology.

While detailed information on a complex character arc is limited, Heavy Metal's core function and personality remain consistent. He is presented as a comedic yet capable support unit whose primary narrative purpose is to enhance the character of Da Cider, providing him with both companionship and a unique method of summoning mecha support. Heavy Metal's unwavering affection for his master, combined with his small but useful ability, makes him a memorable part of the supporting cast within this universe.