Troius is a giant alien monster under the command the Warp Monarch and a minor antagonist in Chouseishin Gransazer.
Troius was sent by the Warp Monarch Fleet to attack the Earth once the three-day ceasefire ended. Dolcross and Leviathan arrived and fought it with the assisstance of the GranVehicles and Yuuhi. Troius succeeds in damaging Dolcross and dismantling Yuuhi. Garuda arrives and gets damaged as well. Eventually, Troius was destroyed by Guntras and Cloud Dragons.