In the alternate future depicted in Date A Live: Rio Reincarnation , the quiet and gentle Spirit Yoshino eventually marries Shido Itsuka. Together, they have a daughter, who later gives birth to Rio — making Rio the granddaughter of Yoshino.
In the main Date A Live canon, Yoshino does not have a granddaughter. However, in the visual novel Date A Live: Rio Reincarnation (specifically the Rio Reincarnation route), a character named appears. Rio is Yoshino’s granddaughter from an alternate future — the daughter of Yoshino and Shido Itsuka in a possible timeline. She is a young girl with light blue hair and a gentle personality reminiscent of Yoshino, but she holds mysterious powers and is central to the game’s original story. yoshino granddaughter
If you need a more general descriptive text suitable for a wiki or fan page, here it is: In the alternate future depicted in Date A