In Lineage II, a player can obtain a monster that becomes their pet. Unlike servitors, as long as certain conditions are met, a pet will not be bound by time limitations. These pets can also hold items in their inventories, including weapons and armor that can be equipped by the pet.

There are four types of adult NPC pets: Wolf, Great Wolf, Hatchling, Strider, and Wyvern. There are also three types of Baby Pets: Baby Buffalo, Baby Cougar, and Baby Kookaburra. And now, there are also Improved Baby Pets, Red Striders, Fenrirs and Snow Fenrirs.