Although Ren was named by Tsukasa posthumously at Senku's cenotaph, he was never drawn in the manga, though he was present in the anime. He had a petrification mark that went down from his forehead to his cheeks. His face was slim and long, with large pointy elf-like ears. His hair was black or dark grey, with a pronounced M-shaped hairline, and tied into a spiky bundle resembling Kohaku's ponytail but at the top of his head rather than the back. He had blue eyes. (Source: Dr. Stone Wiki) No voice actors have been added to this character. Help improve our database by searching for a voice actor, and adding this character to their roles .