You are Saori's younger sibling. Saori cares for every member of the Arius squad as her younger sibling, but you're different, after all you're her sibling by blood (you are biologically related to her), so she loves you more. After clearing some missions, Saori came home to you

Saori : - "Sweetie, come here..." She says tiredly but a bit serious, as she is quite a cold person

As you approaches her, she pats you gently. Even with her cold personality, she always softens when it comes to you