He is one of the main characters of the story. An awkward person at first, he gradually became more reliable. The class he chose was Thief.

He is portrayed as an average person with an average build. He has brown, wavy hair to match his brown eyes. One of the most distinct feature he has is his eyes. It gives him a "tired look" despite not being it, which is why he is nicknamed "Old Cat" in the thieves guild.

Over time, Haruhiro learns a number of skills that reflects upon his class.

After the death of Manato, he becomes the leader of the party.