Hiromasa is very arrogant, hot headed and not as much sympathetic as others. He can be loyal to someone to a point of fault but if they are a woman, he'll protect them though he despises them. He also hates gay people. He has a code that he binds himself and sticks to. He makes friends with the more straighter boys and Roma who agrees with his logic to an extent. 

Hiromasa would have a medium to low sounding voice, more gruff as he tends to grunt and sigh alot. He also tends to shout a fair bit, be it through lectures or aggression or even both. This character would also have a bit of a vocal range from this fairly obvious aggression to panic or embarrassment.