Pets

Pets are any creature(s) a player controls, whether fully or mostly so.

Examples range from WoW's "Hunter" pets (full control, given sufficiently a loyal pet) to AO's "Engineer" robots (full control provided the character's skills are high enough) and on to AO's "Bureaucrat" charmed mobs (sorta like "Hunter" pets, full control, but only for a couple minutes, and they aggro the 'crat right away when the charm runs out).

(If you have better examples from games I (Jae) don't know... bring'em on)