He is similar to Padulah except that he cannot be killed normally. If he hits the player, they are knocked unconscious and will appear in the Ape Atoll prison. Other guards that can appear instead of Oipuis are Oudai, Uodai, Duke, Uyoro and Ouhai. Instead of the player killing Oipuis themselves, he can be killed for medium-sized monkey ninja bones by walking in a monkey form on the trapdoor in the warehouse. The player can then quickly taking the greegree off and wait for him to appear, until a gnome will come and finish him. The player can then re-equip the greegree and take his bones.