Reiji Akiyama 秋山禮二
Reiji Akiyama is an Ajin. He stated to be a fireman with a wife and a daughter.
Akiyama has a strong sense of duty and a high level of concern for the wellbeing of others. He is in many ways similar to Kō Nakano in this respect and is as one point described as being a "jock". He is brave, announcing that he will stop Sato's plans in their first encounter, and is also mentally strong enough to return to his senses and normal thinking after he had been locked in a barrel for around 5 weeks.
(Source: Ajin Wiki)