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Ma-san (マーさん Mā-san, also known as Mar) is the drummer of Milk Can and is depicted as a petite woman with a stick of dynamite lodged in her head. But despite her small size, she is incredibly strong. Whenever she is frustrated, which is often due to her short temper, the dynamite's fuse lights and she goes into a frenzy of drumming, usually leading to something being destroyed. She is generally pessimistic and speaks in gibberish which can only be deciphered if the game's subtitles are turned on. She is supposedly a bookworm, whose favorite subjects are mysticism and economics, and her father owns the local pharmacy.
Ma-san trying to read a book while a bug is distracting her.