She is the gatekeeper of Mugenkan, which is on the border between the Fantasy World and the real world under the lake of blood, which belongs to Yuuka. It's so rare that people come there that she is rather surprised when both Reimu Hakurei and Marisa Kirisame show up one after another, and she fails miserably to stop either of them from entering. She blames it on the long time it has been since she last fought as she says she's really strong.