Rin's Grandfather

The grandfather of Rin Shima appears occasionally throughout the series. Although his name is unknown, his personality is homogenous to his granddaughter, Rin Shima; taciturn, contemplative, and a traveler who has a motorcycle that constantly travels between different mountainous areas of Japan. This wandering and globetrotting life have caused him not to spend much time with his family. His daughter receives his calls from time to time and she would like him to spend more seasons with them at home so he can see his granddaughter grow up. Apparently, he is primarily responsible for encourag...