Mashu are small, friendly, social creatures.
There are two types of Mashu form: a four limbed variety, and a smaller two limbed variety.

The first stand about 4cm (1.75 inches) tall and are vaguely humanoid, walking upright on short legs with two arms. The second type are about half the height and consist of a round body on two stumpy legs.

They tend to travel around in groups of four to ten, although there appears to be no upper limit on how many will gather or travel together.

Mashu behaviour is entirely based around doing what seems like a fun idea at the time.