Saru, like its World Noble owners, wears a helmet to "protect" itself from the outside air that commoners breathe. It has the appearance and color of the toy dog breed pug. However, its legs and body are longer than normal and its tail does not curl.
Saru behaves like a normal dog, but since it lives with the World Nobles, it is allowed to do whatever it wants.
Abilities and Powers
It has not shown any abilities in particular, but as the pet of a World Noble it likely has their privileges.
Sabaody Archipelago Arc
When first introduced in Sabaody Archipelago, Saru came alongside its owners, and urinated on Devil Dias, a slave of its owner who tried to escape but was brutally injured by the Bomb Collar. Shalria sarcastically reprimanded Saru's vulgarity towards Dias.