Solve the two Shikakuro puzzles! These are a blend of shikaku, kakuro, and sudoku whose rules are conveniently spelled out for you explicitly. The result is this:
The flavortext says you have to "reinforce the walls" between any two cells in the grid that have consecutive digits in them. The walls that need to be reinforced are these:
This spells out the solution to the puzzle, which is INGRID (because it's IN the GRID, get it?).