Daisuke is the eldest member of the cast, and is a rather gruff man. 

Daisuke is closed off to pretty much everyone in the cast expect the protagonist, fostering a mentor and student relationship early on. Still Daisuke is a rather tough love type of guy- and has very little sense of humour. However his world knowledge and devoting to his goals and morals create a very passionate and hard working man. 

He should have a low voice.