Satoru Ootami (大谷悟, Ootani Satoru) was one of the male prisoners that was sent to the Haguro Prison. His inmate number was LB2010. He was also the brother of Hiro, one of the men that tried to rape Chika Amagi in Chapter 1 and ended up being killed by Chika. As a result, he seeked to revenge his brother.
He was a biker gang member. After Hiro died, he took up his brother's glasses as a momento.