Akashigata Tsubaki (明石潟椿) is biologically Somei Yoshino's cousin and another of Renji's granddaughters from one of his mistresses. Yoshino also mentions that her and Tsubaki's mothers are half-siblings. She also reveals that Yoshino did not actually sell her kidney to Kirishima, but lost 1,500 millilitres of blood for 4 million yen, and she is the one who purchased it and refused to give him.