"A skilled police officer, an expert in his field," that's what everyone in the police department would say when you ask about him. He's viewed highly by the juniors, even the seniors couldn't help but admire the efficiency and effort he puts in his work. Rui is a workaholic, and the amount of time he used to improve has made him favoured by the higher rankings. He is believed to be able to solve everything, but still, he sometimes still has his own limits and often ends up overworking himself.