Withers/theories

Yakitsuki is a photographer
One effect that Yakitsuki can get is a camera that lets her take photos. There is also a board in her room that fills with photos as she collects effects. Both of these things suggest an interest in photography.

Nature could be Yakitsuki's subject of choice when photographing, as the Camera effect is found in a burnt down forest, as well as a number of the dream areas (Clover World, Dark Mushroom Forest, Wilderness, etc) and effects (Mushroom, Flower Vase) are related to plants/nature.

Yakitsuki's house was burned
From the Burned Ground we know that it's possible Yakitsuki had a tragedy of losing her house, camera and important people in a breaking out of fire. It might cause by an accident from the microwave which Yakitsuki can find the Microwave effect in the Snow World, considered it connected with Burned Ground.