Danbei Hayami, is the father of Seiji. He's a little old man, and is a ninja. Because of his age, he's rather rusty. He's very proud of his family lineage, and boasts about it frequently. 

Personality: Danbei is very proud

Voice: Danbei's voice is a bit hard to describe, outside of just saying it's raspy. He sounds like an old man with all his vigor type. Roshi essentially, but without the old man sound. It's hard to say, so here's just a clip of him in English. Something around here or higher. Sorry for the confusion.