Little Samurai (#14)

Today's Puzzle:

We continue our series of featuring the highest rated puzzles on LMG with number 14 today. The story of four little Samurais that need our help.

Link to Play Along:

Little Samurai by DiMono https://tinyurl.com/SudokuSleuthLittleSamurai

Rules:

Standard sudoku rules apply within each 4x4 grid. The coloured grids use the numbers indicated next to them. The numbers in the central grid are to be determined by the solver.

In the top left red grid, digits along an arrow must sum to the number in the attached circle. Digits may repeat in an arrow if allowed by other rules.

In the bottom left orange grid, numbers in a cage must add to the sum in the top left corner of the cage, without repeating a digit.

In the top right pink grid, clues outside the grid indicate the sum of the numbers along the indicated diagonal. Digits may repeat along a diagonal if allowed by other rules.

In the bottom right purple grid, digits along a thermometer must increase strictly from the bulb end.