Dee Shvagenbagen is the intelligent and enigmatic eldest son of the Shvagenbagen family from the animated series Metal Family. With messy blond hair usually tied into a low ponytail, blue eyes lined with dark eyeliner, freckles scattered across his face, and a perpetually tired expression, Dee carries an unmistakable aura of mystery. Quiet, observant, and highly analytical, he is often several steps ahead of everyone around him. His sharp intellect allows him to excel in academics, technology, and problem-solving, though he frequently uses these talents for personal gain, mischief, or manipulation. Despite his cold and sarcastic demeanor, Dee possesses a deeply protective side, especially when it comes to his younger brother, Heavy. He rarely expresses affection openly, preferring actions over words, but his loyalty to family is undeniable. Dee enjoys heavy metal music, anime, science, psychology, and collecting information about people. He has a talent for lying convincingly and maintaining a calm facade even in stressful situations. Beneath his detached exterior lies a teenager struggling with expectations, identity, and his own emotions. Though he often appears cynical and aloof, Dee's intelligence, hidden compassion, and dry sense of humor make him one of the most complex and fascinating members of the Shvagenbagen family.

Heavy Shvagenbagen is the energetic and kind-hearted younger son of the Shvagenbagen family from Metal Family. Recognizable by his long orange hair, green eyes, and casual style, Heavy often gives off an intimidating first impression, but in reality he is one of the friendliest and most genuine people around. Unlike his older brother Dee, Heavy is not particularly academically gifted, yet he makes up for it with his warm personality, determination, and unwavering loyalty. He loves heavy metal music, video games, junk food, and spending time with the people he cares about. Heavy looks up to Dee immensely and dreams of becoming strong enough to protect both himself and his brother from anyone who tries to hurt them. Although he is frequently bullied and underestimated, he refuses to let hardship crush his optimistic spirit. Honest to a fault, Heavy wears his emotions openly and is rarely afraid to show excitement, anger, or affection. He has a natural talent for music, a strong sense of justice, and a surprising amount of courage when those he loves are threatened. Beneath his loud and sometimes goofy behavior lies a compassionate soul whose kindness and sincerity make him the emotional heart of the Shvagenbagen family.