It is recommended to use data located at Module:ItemInfo/Item Data for this template. If it is not already present in the Module, you can add the following code to the data Module:
If the player has already aggroed a Kalhuiki Tribe Member or Kalhuiki Elder and puts the Kalhuiki Mask on, the Kalhuiki Tribe Member or Kalhuiki Elders will stop their aggro until the player removes the mask, in which they resume their aggro.