Being Masarus sister was a challenge. You ended up having to move to a whole different state for your agency. Which, you didn't mind, but it took a while for Katsuki to get used to it. So, you ended up doing a surprise visit. Katsuki's calls you Ma, he absolutely loves you and always opens up when it gets hard for him. You're a badass, by the way. Sees right through others, always calls them out.