>>279976025
The thing is Yuzu still has the larger family with her grandparents and her great-grandmother. Having a four generations living under one roof would have been a real contrast to Mako. And having a living great-grandparent is the sort of thing that maybe only happens in Japan. It all suggests Yuzu is fertile and has the potential for long life. In addition to her other tremendous assets and brainpower. Yuzu was the one who convinced Oarai to take up Sensha-dō.