Acolyte (Alchemists' Guild)
Acolyte is a second tier rank of a member of the Alchemists' Guild.
Trained acolytes prepare "the substance" in a series of bare stone cells within the Guildhall of the Alchemists. Above each work cell is a room filled entirely with sand, with the floor rigged with an alleged spell to fall away and smother the blaze -and the acolyte - if the acolyte is careless and allows the wildfire to ignite.
After a cache of wildfire from King Aerys' days is discovered in a storeroom beneath the Great Sept of Baelor, Wisdom Hallyne dispatches the most able acolytes with a cart filled with sand to transport the jars of wildfire to the Guildhall.