Sofu

Japanese name:	祖父
Nickname:	Grandfather, Doc, Doctor Holliday, Ringo Kid

Grandfather is the heroine's grandfather. He is a hunter and has a collection of guns. When he was 13 years old, he met his granddaughter and a time paradox was created.

Voiced by: Unshou Ishizuka, Matsumoto Rika (child)

Wikipedia