|Voice Actors|| English: Robbie Stevens|
Japanese: Iemasa Kayumi
|Relationships|| Melina Whistler (Daughter)|
Jean Descole (Employer)
Oswald Whistler is a character in Professor Layton and the Eternal Diva and the father of Melina Whistler. He is a musical director.
After Melina passed away at 22 due to a disease, Oswald was so upset he built the Detragan in an attempt to contain her memories and resurrect her. His first subject, Melina's good friend Janice Quatlane, successfully received the memories due to her willingness to let Melina take over her body. However, Oswald believed the transfer didn't work. Jean Descole then created the game for Eternal Life and told Oswald that the winner of the game would be the next to transfer the memories into.
Amelia Ruth turns out to be the "winner" of the game, but before Oswald can begin the transfer he is stopped by Layton, who tells him of the successful transfer to Janice. He embraces Janice/Melina and apologizes. At the end of the movie, when Melina leaves Janice's body, Oswald plays one last song on the Detragan before he is arrested by Inspector Clamp Grosky.
Oswald makes several appearances in Professor Layton's London Life. He is found at the Oxshire Museum when the player completes the game.