The KoHo Charm is an item in Momodora II. It can be found in the KoHo Plains, right after entering the dungeon. The treasure chest with the KoHo Charm cannot be missed, since the item is crucial for advancing in the game.
Obtaining the KoHo Charm will allow you to shoot paper seals (via pressing Up and S on the keyboard simutaneously). These seals have two uses: Firstoff, they are the only way to use a ranged attack in Momodora II; and secondly they are also needed for clearing blocks that would normally block the way.