Tobias Gregson
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Tobias Gregson was a Scotland Yard detective working in London during Ryūnosuke Naruhodō's time in England. Due to his role in the Professor case, Gregson became known as a legendary detective. However, he began to take cases on alone, secretly.

Working for Vortex Edit

Main article: The Professor Killings

Tobias Gregson helped Hart Vortex frame Genshin Asōgi for being the Professor. He collected a group of thugs together and attacked Asōgi, stealing his trademark ring. Second, Gregson, with Vortex’s help, would argue for Klimt van Zieks’ autopsy report would not be done to a noble with the House of Lords.

After that, he helped Vortex bring a curse on Barok. Gregson would investigate defendants who went free and come up with best ways for Britain's notorious assassin, Ann Sasha, to eliminate them.

Hart Vortex decided to eliminate Gregson being having Genshin's son, Kazuma, kill him. Since Japan and England recently made a treaty, Vortex knew if Kazuma was fully exposed of killing Gregson, England would have difficulty arresting the young Japanese man. Unfortunately, Vortex's plan went wrong as Kazuma was knocked out by Nikomina Borschevic, sparing Gregson for some time.

 Meeting Naruhodō Edit

Main article: The Adventure of the Clouded Kokoro

Second meeting Edit

Main article: The Memoirs of the Clouded Kokoro

Third meeting Edit

Main article: The Adventure of the Unspeakable Story

Faced with a return Edit

Main article: The Return of the Great Departed Soul

Tobias Gregson took Gina Lestrade under his wing to become an inspector.

Death, confusion, and resolve Edit

Main article: Twisted Karma and His Last Bow and The Resolve of Naruhodō Ryūnosuke

Tobias Gregson was given a “Death Bringer” mission for 10/31, aboard the Balabrock as it head for France. The target was Seishirou Jigoku, and in a twist of fate, the assassin sent with him was Asōgi. When Jigoku returned to his room, he found Gregson there. He body slammed Gregson, knocking him unconscious, but as first class cabins are surrounded by guards, he decided to wait until the emergency drill later that evening to do the final deed. Unfortunately, just as that time arrived, Gregson woke up and started attacking Jigoku in a frenzy. In a moment of panic, Jigoku used the gun the English government had given him in his exchange program sixteen years ago and shot Gregson.

He took Gregson’s coat off and hid his body in the freezer, trying to buy some time and fake Gregson’s time of death. He then put Gregson’s body in his own suitcase and took him off the boat and to the hotel, as there was no chance to throw the body overboard due to all the guards.

Dead Gregoson

Tobias Gregson's death.

He had heard about Gregson’s secret room with Everyday Mittlemont from Vortex, and went to drop the body off there. He set up some firecrackers he bought from Venus and used the candles as a makeshift timer that would go off when the body warmed up. That way, when Mittlemont came to visit, he could be framed. Unfortunately, Barok van Zieks showed up on his investigation of detective Gregson and he took the fall instead.

Personality Edit

Tobias Gregson was a hard working detective who took pride in the Scotland Yard's name. As for being a devoted worker, he despised criminals and lawbreakers. Whenever he met with Ryūnosuke Naruhodō and his co., he spoke in distaste for the foreign attorney, but overall treated him as a citizen respectfully. However, because Naruhodō is foreign (or an attorney), he did not go out of his way to help them with an investigation with the exception of Iris Watson's presence. His favorite food is Fish and chips which is rarely ever seen without.


Tobias Gregson is Dai Gyakuten Saiban: Naruhodō Ryūnosuke no Bōken's version of the Inspector Gregson from the Sherlock Holmes canon.


  • Gregson is one of two characters in the Ace Attorney franchise to die in a game that is not their debut appearance, the other being Jezail Brett. Both were introduced in Dai Gyakuten Saiban: Naruhodō Ryūnosuke no Bōken and died in its sequel.

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