Someji Kawamoto

Someji Kawamoto (川本 相米二, Kawamoto Sōmeji) is the grandfather of the Kawamoto sisters who deeply cares about them.

Personality
Someji is pretty mellow and friendly to everyone, but he cares about Rei Kiriyama that he trusts him very much and gives him support when needed.

Upon hearing Hinata Kawamoto being bullied for sticking up for a friend at school, Someji gives her some praise for being brave enough to stand up for a bully victim rather than do nothing.

History
Someji lost his family when he was a child during the war and had to survive on his own. It's partly why he's so taken to Rei Kiriyama, who underwent similar circumstances to earn a place for himself in the shogi world.

Trivia

 * Out of the three Kawamoto sisters, Someji is particularly soft on his youngest granddaughter, Momo Kawamoto.
 * It is shown that once Someji used to hate doctor and tried to avoid them, but after the death of his wife and daughter, he started seeing doctor for his blood pressure so he don't have to leave them alone after his death.
 * From early on, Someji tended to show an interest in Rei Kiriyama as a potential suitor to Hinata Kawamoto, pushing him to go after her when she ran off on her own and generally welcoming him in. When he hears that Rei had declared his desire to marry her, after an initial exclamation he admits that he'd been thinking that'd be perfect for a long time, and reiterates this to Rei himself.