Dexter Alvin Dizznee

Dexter Alvin Dizznee, or Dex, is a member of the Black Swan and a Foxfire Level Four prodigy. He is a Technopath, and he is Sophie Foster's best friend. He was one of the very first elves Sophie met after she moved into the Lost Cities to stay.

Family
Dex has two little brothers named Lex and Rex and a little sister named Bex. They are triplets, which are very, very rare and frowned upon in the Lost Cities. His dad is named Kesler Dizznee and his mom's name is Juline Dizznee. He has three uncles and two aunts on his dad's side of the family, and one aunt ( Edaline ) and one uncle ( Grady ) on his mom's side of the family.

Dex's parents were ruled a bad match because Kesler is Talentless. Dex is picked on by people like Stina because of this.

Kesler owns an apothecary named Slurps and Burps, and Dex often helps him out with the family business. Many elves buy hairoids, supplements, and more over there.

Abilities and Skills
Dex is a Technopath, which he describes as being able to ask mechanical and electric devices how to do what he wants and have them respond. He has been shown to be able to break through security of a human ATM and an Elvin lock. He wanted to keep this ability a secret, so he can stay in his ability detecting class, as he hopes to activate a "better" ability. Later, Sandor informs Dame Alina, who was headmaster at the time, and, although mad at first, Dex comes to love and appreciate the ability.

Dex is very talented and he has created several gadgets, such as the panic ring Sophie wears if she needs reinforcements in case of an emergency, the Sucker Punches he made for him and his friends to enhance a punch, and the ability-restricting circuit he made in accordance to the Council's request, without his knowledge that it would be used to restrict Sophie's abilities. In Neverseen, he created two important gadgets, the Twiggler, and the Evader.

The Twiggler is a gadget that allows the user to gain access to the secret archive hidden in Lumenaria, which is protected by the technologies of six intelligent species: elves, gnomes, dwarves, goblins, ogres, and trolls, and contains transcripts of the negotiations made in Lumenaria. It has wheels attached to it like knobs that can be spun to pull up all the texts that had been blacked out, and it is made up of all the elements of the six intelligent species, and humans as well, as they were once part of the Elvin Peace Treaty.

The Evader is described to look like a gutted obscurer. The sphere had been sliced in half, and all kinds of springy coiled wires stuck out of the center. It allows the user to break into the Council’s archives and find records on the Waywards who have attended, and/or are still attending Exillium. It has a thin wire attached that is called a wiper. The Evader's wiper erases every step the user took to avoid drawing attention to the Council.

His gadgets sometimes caused trouble. Take the ability-restricting circlet as an example. Out of jealousy, Dex created this circlet. However, when Sophie used her abilities for actions related to the Black Swan, they were considered treasonous against the Council. The Council ended up using the circlet to take away Sophie's abilities, with only three councillors on her side. The circlet caused her to have numerous headaches and abrasions and also caused her to stay in at Havenfield and sleep for three days.

Dex is also very good at alchemy and elixir brewing. He helps out in his father's apothecary, Slurps and Burps. He mostly is shown making prank elixirs, but his father lets him help with serious medical elixirs, including Sophie's Limbium-free Fade Fuel. In Lodestar, he displays his skills as an alchemist to make Sophie a bottle of Panakes perfume using the petals from Calla's Panakes.

Appearance
Dex is described as skinny and short, with curly strawberry blond hair and periwinkle eyes, but in Neverseen, he had a growth spurt and is now around the same height as Sophie Foster, compared to before when he was shorter than her. He has prominent dimples that show up when he smiles. As of Exile, it is revealed that he has a burn scar on his side, below his ribs, the size and shape of a thumbprint which was made by Brant, the Neverseen member who had tortured him when he was kidnapped along with Sophie in Keeper of the Lost Cities.

Dex's tree in the Wanderling Woods mirrors his appearance traits. It has a twisted trunk, spiky strawberry-red leaves, periwinkle-blue berries, and stinky flowers.

In Neverseen, Sophie says that her friends stand out, claiming that they "look like models", this includes Dex, as she says that by human standards even Dex is cute.

In Lodestar, Biana gives Dex a makeover, which supposedly changes his appearance quite dramatically and makes him look older and much more mature.

His growth spurt continues in Nightfall, and he's now growing to be the same height as Keefe

Relationships
​Sophie is Dex's best friend and he first meets her when she enters Slurps and Burps with Edaline. Dex obviously has a crush on her and the two are quite close. It does not seem, however, that Sophie reciprocates the romantic feelings entirely, though she does care strongly for Dex as her best friend. At the end of book 1, she nearly faded away just to protect him when they light leaped away from their kidnappers.
 * SOPHIE (best friend/adoptive cousin/ex-crush)

In Nightfall, Sophie kisses Dex and the two realize that there was no spark and that it would be best to remain as friends. The two feel awkward around each other for a long period of time throughout the book until Dex speaks to Sophie at Foxfire, confronting her about her "zombie state", and decide to stay away from one another sitting together. ​Kesler is Dex's father and the owner of Slurps and Burps. Dex constantly helps Kesler make elixirs, including Fade Fuel without the limbium for Sophie. Kesler is Talentless and so people call him a 'bad match' for Juline, his wife. It's shown that Dex cares very much about his father. Juline is Dex's mother and has triplets, a rare thing in the Elvin world. It is shown that they both care for each other a lot. In Lodestar it is revealed that Juline is actually Squall, one of the members of the Black Swan's Collective and a Froster. Dex is hurt when he discovers this because Juline did not tell him sooner but later forgives her. Dex's younger siblings are always noisily quarrelling and playing pranks, and Dex thinks they can be very annoying. The triplets love to embarrass Dex, but despite it all, he still cares for them very much as seen when he expresses his wish not to have the triplets experience the same shame he experienced as a child of a bad match. Edaline is always nice to Dex. 
 * KESLER (father)
 * JULINE (mother)
 * LEX, BEX, and REX (younger siblings)
 * EDALINE (aunt) 

​Grady likes Dex and he usually sees him when he goes over to Havenfield to see Sophie. Also, Grady always try's to push Dex towards Sophie up until the middle of Nightfall, after Sophie and Dex kiss. ​In Exile, when Sophie needs Dex's help he comes and helps. Afterwards, Keefe goes off with Dex to cause trouble because Dex is a Technopath. Dex did not like Fitz at the beginning of the series, possibly because he was jealous of him, and believed strongly that the Vackers were untrustworthy. When they first met, he said that he knew Fitz at the same time Fitz said that he did not know Dex. Dex was under the impression that Fitz thinks he is better than Dex and thus did not bother to remember his name or how to say it correctly, as Fitz had called him 'Deck' the first time they met. Dex always referred to Fitz as "Wonderboy" because he hated that Fitz is seemingly "perfect." When Sophie found out about Biana being told to be her friend, Fitz sent Dex to go talk to her, as Dex has a strong relationship with Sophie. Dex was really upset when he found out that Sophie and Fitz have telepathy training together because he felt like Fitz is hogging Sophie.
 * GRADY (uncle)
 * KEEFE (friend)
 * FITZ (friend/former foe)

However, in Neverseen, Dex and Fitz sort out their differences and finally become friends. In later books, the feud goes on between them, but it's clear that they are friends. At the beginning of the series, Biana and Dex do not interact much. They do not hate each other, but they don't exactly like each other either. In Lodestar, after being the only two left behind from another of Sophie's adventurers, Biana proposes that Dex and herself create their own separate group. Also, during a stay at Dex's house, Biana gives him a makeover by doing his hair. When Linh used her water power, he, along with Fitz, says, "Wow." It is unknown whether he said it because of her amazing powers or if he seemed romantically interested in her. Also, it is shown that Dex also said "Wow" when he saw her for the first time, meaning he might like Linh.
 * BIANA (friend/possible love interest)  
 * LINH (friend/possible love interest)