This is the NPC the player would be able to meet during the night time of the school grounds (yes there is a graveyard in the school). They are technically a Necromancer who turns the dead into a handy paper amulet in which can later be summoned into an undead. Their very laidback but also sly cat-like personality gives more contrast to the Keeper of Gardens.
These two characters were designed to be two different NPCs the player would be able to meet depending on the time. In the daytime, the Keeper of Gardens and in the night time, Keeper of Graves.
I tired to keep some similarities such as the silhouette and gimmick; the enchanted hat, but also give them contrasting features to emphasize their different nature.