Dee

Dee is the first-born child of Glam and Vicky, and the older brother of Heavy.

History
Dee is the oldest child of Glam and Victoria. As a toddler he was “very quiet and easy” compared to his loud younger brother, Heavy, who was born when Dee was two. Neither Heavy nor Dee met any of their extended family from either side and don’t even know their names. However, Dee does have a surrogate "uncle" and "aunt" in Glam's childhood best friend, Ches, and Victoria's best friend, Anna.

Overview
In the second episode of the show, Protector, we see Dee helping other students cheat on their exams in exchange for money, and defending his younger brother, Heavy, from Gopher. This helps to establish his role as a (albeit, non-admittedly) caring older brother, and shows us how he uses his intellect to make money & benefit himself.

These traits are strengthened further in the show, where we see him using his technology skills to clear cameras of evidence that would've incriminated his mother. He is implied to (and later confirmed to in Dee's Q&A) have hacked the family computer system to watch unauthorized content, and even sets a new record time with Glam when completing the Quest.

He isn't perfect at everything, though. Even while above his peers in terms of knowledge and education, in episode 7, Dee is shown to struggle with picking up playing the guitar while Heavy is able to play almost right away. This frustrates Dee, and after an argument with his father, he decides to give up on trying to learn guitar.

Appearance
He has blonde, mid-length mildly curly hair tied back into a ponytail and light blue eyes, resembling his father Glam, althougth he has his mother's nose and freckles. He is usually dressed in a black T-shirt over a white jacket, grayish-blue pants and black boots. He also sports several accessories, like wristbands, dark eyeliner, a black choker and two piercings in his left ear. He is always seen with a aloof/tired expression on his face.

Personality
Dee is fairly serious, and also very mean even when he isn't provocked. He is very sarcastic and a good liar. He is shown to have a nonchalant approach to things throughout the show, preffering to use his intelligence to his advantage rather than strength unlike his mother or brother. Although he doesn't always get along with Heavy, and has said that he is annoying, he still thinks Heavy is "okay", according to his Q&A. Though when Heavy was getting beat up, he was going to offer his academic services for free to Gopher in exchange that he leave Heavy alone, which shows he does care for him. He has been shown to enjoy watching his mother beating people up and solving puzzles with his father and brother. He also was quick to play pretend with Heavy during the quest room, even though their "pretend roles" had to be on his terms.

Playlist
In the official Metal Family VK page, a series of posts about the tracklists of the five main characters were made. Here are the songs that were attached to the post featuring Dee's playlist:
 * System Of A Down - Revenga
 * Avenged Sevenfold - Afterlife
 * Omnium Gatherum - Skyline
 * Mudvayne - Happy?
 * Disturbed - The Light
 * Skillet - Comatose (Live from iTunes Sessions)
 * Static-X - The Only
 * Starkill - Virus of the Mind
 * Slipknot - Left Behind

Trivia

 * Dee was named after Dee Snider from Twisted Sister.
 * As revealed in Dee's Q&A:
 * He is in the 10th Grade.
 * He can speak English, Latin, Spanish and "a little of everything".
 * He refused to answer when asked how much he charges for helping his classmates cheat on their schoolwork.
 * He wears makeup just because he likes it.
 * He doesn’t make distinctions among the people who surround him or people with lower intelligence than his own.
 * He likes Physics and Chemistry but is currently interested in psychology.
 * He doesn't put a lock on his door "so that Heavy doesn't complain."
 * He likes Nu Metal, Heavy Metal, Alternative Metal, Metalcore, and listens to the bands Omnium Gatherum, Black Veil Brides and Ghost.
 * He gave up on learning how to play the guitar.
 * He doesn't know that his paternal grandfather's name is Gustav.
 * He stated that the cigarettes Glam found were not his, but his mother's. (Victorya confirmed this in her own Q&A)
 * He doesn't care about working out since he thinks intelligence is far more important.
 * When asked where does he sneak off to at night he simply says he goes to the bathroom and leaves through the window to avoid going through Heavy's room
 * He doesn't like FK nor Instagram.
 * He is an Atheist.
 * He doesn't know were he will study but isn't worried about that.
 * He has "his methods" on dealing with bullying.
 * He prefers cars over bikes as they are safer.
 * It takes him 10 to 15 minutes to do his hair to go out.
 * He described his relationship with his family as "normal".
 * Unlike Dee Snider, whose real name is Daniel, Dee's full name is just Dee.
 * He claims nobody dishonors or makes fun of anybody in his family and accuses whoever asked him of projecting their personal problems in his family.
 * Dee likes girls who take care of their appearance and dress nice.
 * Dee sees Chive as an uncle of some sorts.
 * Upon being asked if he felt bad about Glam insulting him, Dee brushed it off as one of "[Glam's] moments".
 * He has many phones.
 * Dee denies hacking Heavy's Q&A.
 * Dee plans to move out as soon as he turns 18 since he wants more personal space.
 * He doesn't like his hair loose.
 * He has played Undertale and took the Genocide route.
 * He prefers Hellsing over Hellsing OVA.
 * He doesn't drink alcohol because he doesn't need it.
 * He watched Naruto and his favorite character is Shikamaru.
 * When Dee ran off at the end of his Q&A, it is revealed that an unknown man with glasses was spying on him from the backyard. The same man can be seen in a poster in "Lif".