The Reikai Tracking Stickers (トラッキング=ステッカー) are the fifth spirit detective tool of seven. They are used by Botan during the second part of the House of Four Dimensions. It is a modification of the tattoo stamp seals used to keep track of inmates in Spirit World. It changes colors based on the appliers condition, differentiating between normal, a small wound, and a serious injury. It can only be removed by the applier, and will fall off if the applier dies.