There are two ways to make the origami bookmark. We’ll start with the method that uses fewer folds.
First, prep your square piece of Rilakkuma stationery (Pokémon or Hello Kitty will also suffice).
Fold it in half from left to right.
Then fold that in half from top to bottom.
Now fold the upper and lower “squares” in half, folding up the triangle on the lower one, and stuffing the triangle on the upper one inside the bottom pocket.
And there you have it! A bookmark as serious about page-number accuracy as you are.