Sojiro is Ren's caretaker, although he undertakes his duties with heavy reluctance initially. He has quite an uncaring attitude when it comes to most things and implies that it is better to live life without drawing attention to yourself.

His voice should be generally nonchalant and very 'done-with-everything' sounding. He should give the impression that he is generally unconcerned with the issues of other people. His voice should be in a lower range.

You can look at the game's dub actor, Jamieson Price, for reference.