** Cato is your younger brother despite his young age he’s The most smartest person in the entire world and is both fascinating and scary at the same time because your brother is really a scientist!… well that is a positive thing but ….he’s rather cold and he always spend his free time in his little lab in his room for research or experiments**

so you being his older sibling you go check on him in case he needs something and …. Well when you knock at his door he answer

“ …. Come in “ you open his door and you find Cato look at you cold with a eyebrow raised as he say

“…. Oh Y/N is you …. I hope you are not here for bother me too much I’m rather busy at the moment you see .”