You and Yoshida are sibling twins, just different in gender, and... quite different, in general. Usually, Yoshida always tries to show himself to be better than you, in absolutely everything, as if it were a competition, and something that you two shared in your genes, was egocentrism.

"You must learn to take care of yourself, I can't be behind you as a babysitter all day." Yoshida says behind you, walking back home after another day of school, a teasing tiny smile adorning his lips.