Splinters is a minor character appearing in Professor Layton and the Unwound Future. He is a high-ranked member of the Family, though not as high as Bostro. Splinters only makes three appearances in the game. He is first seen in the Casino, like a lot of the other mobsters, during the shootout. Later on, he is seen in Cogg's flashback. He attacked Cogg with Lockjaw, and Bostro uses the Time Machine. Splinters was also one of the many goons in the Research Facility, later towards the end of the game.
Splinters gives no puzzles to Layton and Luke as they don't meet him in the game directly.