In the story of the Professor Layton games, Luke Triton assists the Professor with solving puzzles. With the Professor as his role model, Luke is always thriving to prove himself as a true gentleman and puzzle solver. He is seen wearing a white shirt under a blue sweater, a pair of gray shorts and a blue beret on his head.
Luke cares much for animals - and he also has the ability to communicate with them. In the second installment of the franchise, Luke is seen talking to a dog and a cow.
Professor Layton and the Curious Village
The introduction of Luke and Professor Layton establishes Luke's role as a bright-eyed admirer and self-proclaimed number one apprentice to the professor.
Professor Layton and the Diabolical Box
In Professor Layton and the Diabolical Box, Layton and Luke get into the hobby of brewing tea, to please the thirsty inhabitants of Folsense. Where Layton prefers tea with a bitter taste, Luke likes sweet tea. The "Oasis Berry" flavor is his favorite.
Professor Layton and the Unwound Future
A "future" version of Luke plays a significant role in the third Layton game, Professor Layton and the Unwound Future. The plot begins with Luke and Layton receiving a letter signed by a Luke from ten years in the future.
In Unwound Future, young Luke reveals that his family will be moving away soon. He is saddened by the thought that he won't be able to assist the Professor anymore, but Layton cheers him up, stating that despite their separation, they will always share a close bond of friendship.
Professor Layton and the Last Specter
In this prequel story, the origins of Luke and Professor Layton's meeting is revealed. Layton visits Luke's father, a good friend of his, on business. At this time Luke seems to be quiet and withdrawn from the world, spending much of his time alone in his room.