|Appearances|| Miracle Mask|
|Other Names||Uncle Leon|
|Voice Actors|| English:|
|Relations|| Rachel Bronev|
|Other|| Emmy Altava|
|Occupation||Leader of Targent|
Leon Bronev is one of the villains within the game Professor Layton and the Miracle Mask and Professor Layton and the Azran Legacy. He is the leader of the corrupted group Targent, who searches for the Azran's Legacies.
Bronev wears a dark blue blazer with a red shirt underneath, and white pants. He also wears brown shoes, sunglasses, and has brown hair and a beard.
Chapter 7: The Reunion Inn
Bronev occupies one of the classiest hotel rooms available in the Reunion Inn and is seen looking at photographs of the Masked Gentleman, Ambrosia, Akbadain Ruins and the Golden Garden (As seen in Professor Layton and the Last Specter).
In a special episode, Inspector Bloom reports to Bronev that Professor Layton was involved in the Masked Gentleman investigation. He tells Bloom he was of no concern, as well as Descole, even if they discovered the city's secrets. Bronev tells him to focus on his mission, and Bloom assures him he wouldn't fail.
After the Credits
After the credits have rolled, Bronev, along with Targent, turn up to claim the Nautilus Chamber of Akbadain, but see Jean Descole already there to claim it. They surround the area and Descole, who approaches Bronev. He attacks Descole and after, tries to unmask him. Raymond throws a smoke bomb and disappears with Descole before his identity can be revealed. Bronev then orders the members of Targent to secure the last of the Azran Legacies.
Bronev wears a blue suit jacket with yellow buttons and a white handkerchief in the top right pocket, red shoes, a red shirt, white trousers and dark blue sunshades.
"A man whose identity is shrouded in mystery. Detective Bloom is his subordinate, and he appears to have some sort of connection with Descole, but even this fact is, at present, unclear. He seems to be looking for something related to the Azran civilization...but what?"
"An archaeologist who was kidnapped by Targent. Hoping to win his and his wife's freedom, he strove to find the Azran legacy, but his wife died before he could succeed. After that, he resorted to ever more ruthless measures, and ultimately became Targent's leader."