Question: is arima related to rize?
Answer: Alright so just to clear something up, the Arima family is a branch family of the Washuu. Although he did not carry the Arima name, the eldest of the Arima family is Tsuneyoshi Washuu. ... Rize is the biological daughter of Tsuneyoshi and paternal half-sister to Kishou. Yoshitoki is a parental half-brother to Kishou.