Ryu Katsunaga

勝長龍
24 years old. Oto Police Department public safety division. Ryu is Kotas classmate and roommate in the police academy and one of Kotas few friends. He was transferred to the Oto department in October. He has two younger sisters the older one is a highly knowledgeable college student. The younger one is a total ditz who call him Ryuchan.