none of what I say is cannon only speculation. And she dosent have a name in show and manga so I gave her one please don’t be mad I missed details.

Atsuya aka Shiyo’s older brother. Shiyo lost her son during the Shibuya incident… she’s sits in a wheel chair most of the time after that incident… not because she needs it but the internal pain from losing her son is too much that she can’t even function…