Some armies drive colossal beasts to battle, beastmasters hurrying at the monster's heels as they goad it into the foe.
Source: Warhammer Fantasy: 8th Edition
Monster and HandlersURL Copied!
The handlers aren't really a combat unit per se, so we ignore them for most gaming purposes, treating the monster itself as the extent of the unit. When the monster suffers an unsaved wound, roll a D6. On a roll of 1-4 the monster suffers the wound as normal, but on a roll of 5-6 a handler model is removed instead. Once all the handlers have been removed, the monster must take a Monster Reaction test just like a ridden monster that loses its rider.
In close combat, the handlers can direct their attacks against any enemy in base contact with their monster. The handlers are otherwise assumed to have their hands too full controlling the monster to carry out any actions like shooting, or casting spells, etc. In addition the handlers cannot be charged, attacked or otherwise affected separately from their monster – if they are found to be blocking movement or line of sight, the controlling player simply alters their position, just as you would for any other battlefield marker or counter. If the monster is removed, so are its handlers.