For the anime-exclusive prosecutor Tristan Turnbull, see here.
Voiced by (Japanese): Yoshino Aoyama (anime)
Voiced by (English): Morgan Garrett (anime)
An abandoned Pomeranian puppy that Edgeworth adopts right after the class trial that brought Phoenix and Larry together.
- Canine Companion: He develops a particular attachment to Edgeworth after meeting him, and spends much of his time around him during his childhood.
- Cuteness Proximity: His Puppy-Dog Eyes wind up guilt-tripping Larry into turning the money Missile picked up over to the police instead of keeping it for himself.
- Fake Crossover: He bears the same name and design as Missile from Ghost Trick, another Shu Takumi creation, who was based on Takumi's real Pomeranian.
- Named by the Adaptation: His name is never stated in the Japanese version, while he's called "Missile" in the English dub.
- One Steve Limit: Averted. He shares his name with the K-9 police dog, who was reduced to a cameo in the anime's second ending sequence to show the two are distinct dogs.
- Small Role, Big Impact: In the anime adaptation, he's the one who takes the money Phoenix is accused of stealing from Edgeworth after the latter drops it by mistake, leading to the class trial that set Phoenix's path to becoming a defense attorney in motion; Larry simply coaxes it from the dog and takes it to the police, and simply forgets to bring it up.
- Unwitting Instigator of Doom: Zig-Zagged. If he hadn't brought Edgeworth's lunch money to Larry, Phoenix wouldn't have been accused of stealing it. On the other hand, the three boys never would've become lifelong friends.
Goldy Gerwitz (Harami Jorosu)
Voiced by (Japanese): Kimiko Saito (anime)
Voiced by (English): Christopher Sabat (anime)
A portly woman who has a run-in with the von Karma family—including a younger Miles Edgeworth—at Lordy Tailor in 2004 when she claims ownership of a missing Pomeranian named Napalm.
- Adaptational Villainy: The English dub goes as far to say that Goldy is an ex-convict when she cries she's Never Going Back to Prison.
- Always Murder: A rare aversion for the series in that she is not involved in the death of anyone in any sort, let alone any actual crime.
- Animal Motifs: She dresses like a cow with a spotted coat and a bell around her neck, and her hair points up in a manner resembling bull horns when she has her Villainous Breakdown.
- Didn't Think This Through: She tries tricking Edgeworth into handing over a missing dog with a hefty reward by pretending to be its owner so she could hog the money to herself. She never counted on Edgeworth hearing the same report, which triggers her Villainous Breakdown when he asks her for the reward money since he found the dog first.
- Expressive Hair: Her hair points up in the shape of bull horns when Edgeworth incurs her wrath.
- Fat Bitch: She is a very plump and unpleasant Jerkass of a woman.
- Glowing Eyes of Doom: Her eyes glow red when she looks like she starts rearing at Edgeworth.
- Greed: She wants to keep the $5,000 reward for a missing dog all to herself, and tries to stop Edgeworth from beating her to the punch.
- It's All About Me: When proves how self-centered she is when she sees that Edgeworth has found a dog worth a sizeable reward and tries to swindle him out of it so she can hog the prize.
- Punny Name: "Goldy Gerwitz" sounds an awful lot like "gold digger".
- Tears of Fear: When Manfred von Karma dares her to take things up in court against him, her response is to run away crying like a baby.
- Villainy-Free Villain: Technically speaking, her underhanded plan to claim a handsome reward for a missing dog isn't exactly illegal, since she'd still have to return the dog to its rightful owner; it's just that she's motivated purely by greed and selfishness, whereas Edgeworth feels the reward would be put to better use as a charitable donation. The English dub downplays this by having her state she can't go back to prison with Manfred von Karma presiding if she decides to take the case to court.
- Villainous Breakdown: After Edgeworth demands she stay true to her ownership of Napalm by paying him the $5,000 reward she's after, her hair curls up into a pair of bull horns and she starts pawing the ground with her foot like she's about to charge him.
- Vocal Dissonance: The English dub of the anime gives her a deep, masculine voice courtesy of Christopher Sabat.
- Womanchild: She shows hints of it when she starts singing the theme to Signal Samurai, a children's show whose music she'd just heard on the radio, and later when she runs away crying like a baby after getting beat.
Voiced by (Japanese): Aya Suzaki (anime)
Voiced by (English): Amber Lee Connors (anime)
A radio DJ who ran the lunchtime slot in 2004.
- Accidental Hero: By playing the Signal Samurai theme on the radio as a request for Phoenix when she does, she inadvertently provides Edgeworth with evidence against Gerwitz claiming ownership of a missing dog.
- One Steve Limit: She averts this by sharing her name with Dee Vasquez.
- Punny Name: "Dee" is the first part of "DJ", while "Tomorina" contains the Japanese word for "friend" (tomo), befitting a "lunchtime buddy".
- Small Role, Big Impact: In a roundabout way, if she hadn't played the Signal Samurai theme on the radio at Phoenix's request for Edgeworth, then Edgeworth wouldn't have demonstrated his keen prosecutorial skills in front of Manfred von Karma, who officially molds him into becoming one of Phoenix's fiercest rivals.
- The Voice: She's only ever heard over the radio.
Voiced by (Japanese): Yoshino Aoyama (anime)
Voiced by (English): Mikaela Krantz (anime)
A female Pomeranian who gets lost in Lordly Tailor.
- Distaff Counterpart: She's essentially a female Missile (Edgeworth's Pomeranian, not Gumshoe's Shiba Inu) with a similar name.
- Meaningful Name: Napalm is a flammable adhesive gel that's used in warfare. Moreover, it matches well with the name of her male counterpart, Missile.
- Tertiary Sexual Characteristics: You can tell she's a girl by the pink bow and heart-shaped belly spot.
- Tropey, Come Home: She gets loose in the biggest shopping mall in town, with a whopping $5,000 (500,000 yen) reward for her safe return.
Avery Richman (Hubley Richnande)
Voiced by (Japanese): Masaki Terasoma (anime)
Voiced by (English): Charlie Campbell (anime)
A multimillionaire from the Goldstruck Republic, and father of Japan's special express train, the Silver Star. After being found guilty of murder in the United States, he has become a fugitive and is willing to do anything for a retrial.
- Clear My Name: He claims that all of the evidence against him in his initial murder trial was falsified, and he sets out to prove his own innocence by luring Phoenix and everyone involved into an armed hostage situation to force a retrial.
- Eccentric Millionaire: The guy makes himself a Japanese citizen, buys and expands an old railway to the entire countryside for a state-of-the-art luxury express train, and aesthetically models said train after a 1950s steam locomotive, simply because he really loves Japan and trains. And that's to say nothing of his plan to lure his enemies and Phoenix onto the train, hijack it, and take its passengers hostage just so he can have a retrial.
- Going Native: He has such a great love and appreciation of Japanese culture that he went and got himself nationalized as a Japanese citizen. Because of this, he ends up being transferred from the U.S. to Japan to serve his death sentence.
- Nice Hat He has a swanky top hat like a tycoon out of a western.
- Not Helping Your Case: He resorts to carrying out an armed hostage situation aboard his own train to claim the chance to prove himself innocent in a murder charge.
- Punny Name: Avery Richman is certainly "a very rich man".
- Railroad Baron: Invoked. He's already so rich and influential that he poured his personal funds into constructing a Retraux luxury train purely out of passion for railroads.
- Well-Intentioned Extremist: All he wants to do is clear himself of his murder charges, but he does this by using armed force to hijack an entire train filled with the people who'd make this possible.
Voiced by (Japanese): Hana Takeda (anime)
Voiced by (English): Dusty Feeney (anime)
One of the Silver Star's attendants, and a native of the Goldstruck Republic.
- Broken Heel: She trips and falls while chasing down Gumshoe to stop him from escaping to the other train cars. Unfortunately, she's also carrying a loaded machine gun, and accidentally grazes his arm.
- Expy: She takes her name and appearance from the main character Regina from Capcom's Dino Crisis, in which Shu Takumi was a game designer.
- Must Make Amends: She helps Gumshoe contact Edgeworth to aid in Richman's retrial to make up for accidentally injuring him.
- One Steve Limit: Played straight in the Japanese version, but averted in the localization, both of which use the same name. Her first name matches Regina Berry's name from Turnabout Big Top, but not anyone in Japan.
- Punny Name: A woman named "Locomoti" winds up serving aboard a steam locomotive.
- Undying Loyalty: She believes in Richman's innocence like the rest of her countrymen who are involved in his escape from prison.
- You Gotta Have Blue Hair: She has distinct scarlet hair.
Voiced by (Japanese): Takuto Yoshinaga (anime)
Voiced by (English): Josh Bangle (anime)
The head attendant aboard the Silver Star, and a Goldstruck Republic native.
- Expy: Like Regina, he bears more than a passing resemblance to Rick from Dino Crisis, albeit with a Race Lift.
- Guilt-Ridden Accomplice: His desperation to hide his betrayal of Richman is what gets strong-armed by Turnbull into hiding the death of the one person who could've cleared Richman's name. He is deeply ashamed of everything he's done once Phoenix forces him to come clean.
- Multicolored Hair: The top of his hair is brown, and the rest is black.
- My Greatest Failure: He regrets getting bribed into helping the American police frame Richman for murder, even though he had no idea it would happen. Unfortunately for Rick, his guilt leads him to become Turnbull's accomplice in Gale's murder.
- Number Two: He's in charge of the other crewmen aboard the Silver Star.
- Punny Name: He is an attendant aboard a steam train, or at least one modeled like it.
- Regretful Traitor: His Tears of Remorse as he recounts his betrayal of Richman indicate that he had no idea that he was aiding a conspiracy to boot Richman out of the United States until it was too late. He also doesn't look the least bit pleased when Turnbull forces him into being his accomplice in Gale's murder.
- Undying Loyalty: Like the others involved in Richman's plans, he believes in his "king's" innocence and wants to see justice dealt to those who had him convicted. Subverted when it's revealed he unwittingly helped frame Richman in the first place, and rather than come clean, he helps Turnbull hide the true murderer's corpse just so his treachery won't get found out.
Mara Mytonbred (Jamnutte Pantaberuno)
Voiced by (Japanese): Ikuko Tani (anime)
Voiced by (English): Linda Young (anime)
A wheelchair-bound old lady who served as a witness in the original murder case of Avery Richman.
- A Birthday, Not a Break: She goes through seeing her own table being set on fire, getting held hostage aboard a train, and avoiding getting caught in a bomb explosion all on her birthday.
- Cool Old Lady: She's a very sweet 87-year-old, and despite having every reason to fear and mistrust Richman for being an escaped convict with murder charges, she remains cordial towards him for his gentlemanly behavior.
- Family Theme Naming: She and her granddaughter have bread- and spread-based names.
- Punny Name: Her English name sounds very similar to "Marmite on bread", and her Japanese name is directly translated as "eat bread with jam".
Vega Mytonbred (Butterde Pantaberuno)
Voiced by (Japanese): Kaya Okuno (anime)
Voiced by (English): Kristi Kang (anime)
Mara's granddaughter and caretaker.
- Family Theme Naming: She and her grandmother have bread- and spread-based names.
- Hair of Gold, Heart of Gold: She is a blonde girl and one of the most innocent passengers on the train.
- Innocent Bystander: Apart from witnessing Richman's apparent murder of Cashanova, she hardly has anything to do with the shotgun trial aboard the Silver Star.
- Nice Girl: She's as sweet as her grandmother and only wanted to give her a surprise birthday party on a luxury train.
- Punny Name: Her English name sounds very similar to "Vegemite on bread", and her Japanese name is directly translated as "eat buttered bread".
Voiced by (Japanese): Shinpachi Tsuji (anime)
Voiced by (English): Brad Hawkins (anime)
A member of the All-American CRY Foundation who testified during Avery Richman's original trial.
- Fat and Skinny: He makes up the tall and skinny half of a pair with Allan Cylinder.
- Punny Name: He takes his surname from a train piston, and his name combined with Allan Cylinder's is one name off from Edgar Allan Poe.
Voiced by (Japanese): Takaya Hashi (anime)
Voiced by (English): Shawn Gann (anime)
A member of the Council who testified during Avery Richman's original trial.
- Fat and Skinny: Together with Edgar Piston, he serves as the stout and fat one of the pair.
- Punny Name: He takes his surname from a train cylinder, and his name combined with Edgar Piston's is one name off from Edgar Allan Poe.
Voiced by (English): Patric Carroll (anime)
A waiter who worked at the venue where Avery Richman allegedly murdered Benjamin Cashanova.