Funeral Gates

The teleportation gate is in the control room for personnel that allows Rou to move between floors or the dungeon he has conquered.

Rou probably knew the usefulness of the warp gate besides teleport between floors but also between dungeons after the second dungeon he plunder [the probably Dungeon from the Demigod of Spring Water【Waterfall Basin of Spring Water, Aquarium Forlia】.

Funeral Gate is probably Rou's name given to his Transportation gate because the dungeon plunder by him changed with the name Funeral as the first name without exception.