Sakura Saku

A double bass player whose family was in trouble because despite her father's business is about to bankrupt, however: he did not want to part with his collection of rare violins, until he got some "persuasion" from Chiaki. A student of very short height, Sakura was mistaken as an elementary student, when she first came into the orchestra, and as her instrument is too much larger than herself, people usually do not see her when she is carrying it on her back, thinking it is moving by itself.

Source: Wikipedia