Shingo is a teenage boy of average height, with blonde hair and light skin. His gelled hair and open collar give him the appearance of a thug. Shingo has an average weight with the least muscle of the five boys. Only Jouji Nezu is shorter than him out of the five boys. He is commonly seen wearing the normal school uniform with an open collar and no tie.

Shingo is a moody and nonchalant individual who is often the source of the more pessimistic opinions shared by the boys. He often makes selfish decisions for self-promotion or personal benefit at the expense of the 'team', putting him at odds with the other boys. Shingo is one of the more lecherous people in the boys, eagerly plotting to peek at a female bathing area with the other boys. He can be excessively narcissistic at times, holding his physical appearance in high esteem and requesting a hair pomade as a prisoner gift.

Though he is mostly loyal to the other boys, he sometimes acts with hypocrisy to betray them and then judge Kiyoshi Fujino badly for the same act. Shingo is prone to sulking and acting peevish when things are not going the way he likes, leaving his cell unkempt and constantly voicing his complaint when all their prison stays are extended.





(Source: Prison School Wiki)