Musashimaru (武蔵丸, Musashimaru) is the pet cat of Kotori Hasutani.
Musashimaru is a large shaggy six-year-old male mixed-Persian with light brown fur.
Musashimaru is a very boastful, aggressive, and confident cat that likes to assert his authority over others.
At the start of the series, Musashimaru debuts by appearing before Kansuke and demanding that he pay his respects. However, the defiant Kansuke challenges him to a fight. Their fight is interrupted however, by the arrival of Tsukumoishu.
When Musashimaru is given food materialized by Kotori's power, he exponentially grows in size and is able to fend off enemies with great force.