Character
Ryuhei Sasagawa
笹川竜
Also known as: Boy #10
Biography
Show bio — may contain spoilers
In the novel and manga, Boy #10 Ryuhei Sasagawa is a member of Kiriyama's street gang with long hair. After being told told by Kiriyama to meet with the other gang members at a certain point on the island, he, along with the other gang members, is killed by Kiriyama. (Source: Wikipedia)
Appears in