The Leadership allows a character to gain a loyal cohort. With the GM's approval, this cohort can be a similarly aligned monster. Monsters on the following list all work well as cohorts (be they assassins, bodyguards, mounts, etc.)—their effective cohort “level” corresponds to the level available to the PC as afforded by his Leadership score. Use these monsters as guidelines when determining cohort levels for other monsters.
For more information on monster cohorts, reference the main monster cohort entry.