Even though she is only six years old, Nanako is very precocious for her age. The entire IT has pretty much adopted her as their younger sibling, and Rise is no exception. When she asked her who she preferred, Rise or Risette, Nanako let her know, even if she didn't realize, that such differences were irrelevant and she liked Rise no matter what. Rise felt silly for asking such a hard question of someone so young, but was touched by her words.

Given how much the younger girl has gone through, combined with her youth, Rise is incredibly protective of her. While she knows she has gotten to spend much more time with her father since coming to Death City, she's determined to be as much of a big sister as she can be.