Dark LegacyRoles for pets and minions.
Syntax: order pet role <rolename>
Each pet species knows a fixed set of roles, shown in 'pet score'. (For example, a grizzly bear might be able to act as a frontline defender, while a wolf might be a good roaming defender/skirmisher). Familiars function like normal pets, so most have multiple roles to pick from.
A riders role is bestowed upon the mount, even when that mount is unskilled to perform that role themselves.
The game also finds it under: pet_roles, minion_roles, familiar_roles, mount_roles, roles for pets and minions, pet roles, minion roles, familiar roles, mount roles.