Guy Diamond

Guy Diamond is a Troll with silver skin covered in sparkly white glitter. He has long silver hair that sticks up with a metallic shine to it. He has greyish-blue eyebrows, blue eyes and a green nose. He wears a green Hug-Time Bracelet that blooms into a green flower when it's hug time. As with other Glitter Trolls, Guy doesn't wear clothes. Guy's voice has an auto-tuned sound, and is the only character voice so far to be like that.

Guy Diamond is ambitious, cheeky, and just a little bit vain. His musical voice and propensity to shower everything and everyone with glitter make him a great addition to any party.

Queen Poppy

Guy is one of Poppy's closest friends, and therefore a member of The Snack Pack.

Branch

In Trolls, he generally found Branch a downer, much like other Trolls until the movie's ending. At the same time in the Trolls: The Beat Goes On! episode "Glamping", he states that he finds Branch outrageous and different, and that he wants to be in on a lot of things Branch has to offer, but isn't aware of how intrusive he is being towards Branch.

Biggie

Throughout Trolls: The Beat Goes On!, Guy is shown to be supportive and encouraging of Biggie.

Lownote Jones

Lownote and Guy have a mutual consideration and respect of each other. While Guy loves being the center of attention, Lownote can accidently grab attention from others. The two don't mind sharing the focus as both have similar concerns with being the center when it comes to others.

Dingy Diamond

Dingy Diamond is an alternate dimension counterpart of Guy whom he met during a scavenger hunt run by Lownote Jones. Though keen to meet his alternate self, he changes his mind when put off by Dingy's stench; the two didn't get along at all.

Tiny Diamond

Guy gives birth to a son named Tiny Diamond in Trolls World Tour. He's seen to be happy and amazed at his new son.

He has most normal Troll abilities, as well as the abilities of his Tribe and those of a Glitter Troll.

Guy Diamond is known as the "Life of the Party". He loves attention, but he also loves giving attention and tries to often lift every event he attends. As much as it seems to overbearing for more quieter Trolls such as Branch, Guy means well; he just doesn't know when too much is too far. Since he considers himself the Glitter Troll and thus cannot be seen to do anything less than to make things specular. He is also seen having a desire to make others shine as much as himself. Examples of this include pitching a invention of his to Sky Toronto in "Weekend At Diamond's", and making sure Smidge was also the center of attention alongside him in "Hair Ball". This continued in the Trolls: TrollsTopia episode "The Makeunder", where he tells Lownote Jones that he really doesn't mind sharing the spotlight with the Funk Troll.

Guy has tried several times to sell ideas and new brands to other Trolls, sometimes because he wants in on the glory and other times hoping to better the life of others. His desire to make up others more like Glitter Trolls by glittering them up (proposing a new holiday "New Glitter's Eve" in "Blank Day"), and attempts to make other Trolls shine just like him are often behind the root of his ideas.

In Trolls: The Beat Goes On! and Trolls: TrollsTopia, Guy was shown to do acting. He enjoys a good story to go alongside his skills, and likes to act using a method acting style. His acting is a reflection of his personality.

As typical of Pop Trolls, Guy Diamond dislikes mundane explanations and metaphors, preferring something fun and accessible instead. Guy often does idiocy because between his vanity and love of the fun, he jumps to conclusions and acts without thinking. This was a running gag throughout Trolls: The Beat Goes On!, where it constantly led him to do rash things when with other fun-loving Trolls such as Smidge. Guy otherwise shows average intellect, and aside from things related to his own passions and vanity, often doesn't display a lack of intelligence or a lot of it. In Trolls: TrollsTopia, he's much less reckless, but this is mostly linked to his present fatherhood, as Guy shows more responsiblity and is in turn less likely to do moronic actions.

Guy Diamond boasted in the Trolls: TrollsTopia episode "Funtography Day" that he had never had a a bad photo taken of himself in his life. He shows off his work in his own "Guyllery". Part of this is owed to the beauty of being a Glitter Troll, making him stunning to beyond. But he's also a execellent model with creatative ideas to get good shots. He relies on "help" from fans and lighting to get great shots. In "Ready, Set, Calendar!", Guy and Holly Darlin' were asked to complete the TrollsTopia calendar, and both displayed a knack for photography, only failing with one of their desired photographs.

Guy Diamond is very competitive at times, to the point that in the Trolls: The Beat Goes On! episode "The Party Games", he forgot that the point of the competition in the episode was only to have fun. Mostly, winning allows him to become the center of attention, something he craves and like all things Guy does that leads to his ego inflating, is another thing he often needs to reel in.

Guy's voice has a auto-tuning effect on it. When he sings or talks, his voice can sound digital at times. Since no other Pop Trolls had been seen with this ability, it is presumably a talent he developed himself. In the Trolls: TrollsTopia episode "Funder Construction", Guy mentioned the first time he did the autotuned vocals, he didn't quite get it right, thus got a half-autotuned vocal. This indicates that he learnt the trait by accident, so it wasn't a trait he was born with and it took him more than one go to get it right. In "Friend Matching", Sky Toronto managed to capture his "gift" too via a microphone. In some Trolls World Tour media, it was said that the Techno Trolls could do this too, making his "gift" outside of their Tribe an unique oddity. In "Whimsy Wasps", when his whimsy is exhausted and he becomes very serious, he makes his voice auto-tune by accident and repeats what he had said without it. This implies he has control over the ability and can switch it off if neccessary. In "Big Poppy", when he is auditioning to compete in a compliment rap battle, he finds it impossible to rap as he auto-tunes everything. In media outside the films, Guy is also known for his excellent dance moves; thanks to his glittery body, his moves are stunning to behold. Very few Trolls can outdo him in dancing, with Cooper being one of them, but this is due to Cooper having 4 legs to dance with. The character bios for Trolls list only Moxie Dewdrop as one of the few who could compete with Guy Diamond, though she doesn't appear in most Trolls-related media.

Until "Don't Make Me Laugh!", Guy was the current reigning champion of the "Knock out" tournament, his style involved telling knock, knock jokes. He was knocked out by Cooper who interupted him with a "interrupting cow" joke. Guy represented the Pop Troll Tribe in the tournament.

In "Flyer's Ed", Guy attended Lownote Jones' flying lessons. He passed the class, but like most of the students came nowhere near Poppy and Val Thundershock's grade. It's unknown if he progressed in his vehicle maneuver skills beyond this.

In the Trolls: TrollsTopia episode "Funder Construction", Guy mentioned the first time he did the autotuned vocals, he didn't quite get it right, thus got a half-autotuned vocal. This indicates that he learnt the trait by accident, so it wasn't a trait he was born with and it took him more than one go to get it right.