Grandpa

Grandpa is Rio and Rick's grandfather.

Manga and the 2009 anime
Grandpa only appears briefly, helping Scar heal from his wounds in his battle against Gluttony and Lust.

2003 anime
Grandpa has a larger role in the 2003 anime, as Rick and Rio appear in more episodes then in the manga. Aside from lodging Scar, he tells the boys the truth about their mother and her death after their brief disappearance.