1Slice firm tofu into uniform cubes and place in a bowl, then pour oil and soy sauce over them and mix to coat.
2Place tofu on an air fryer rack and air fry for 8 minutes.
3Slice carrot, cucumber, and red bell pepper into strips or pieces.
4Blanch the spinach in a pot of boiling water.
5Sauté the red bell pepper, corn, and carrot slices in a pan with salt.
6Press cooked white rice into a Miffy-shaped bento mold and unmold it into the center of the bento box.
7Assemble the box by placing the cooked tofu, sautéed vegetables, cucumber, and spinach around the rice bunny, and decorate with nori for the face and drizzle with mayonnaise.