a Haru
A Haru is like a magical being that explains everything you don’t get. They’re mysterious and sometimes look like a ninja.
"Haru is like a ninja. He appears out of nowhere and solves all my problems.", @NinjaFan
“Haru is the reason I passed math. He’s a mystery man.”, @MathStudent
“Haru is like a god. He knows everything.”, @MysteryMan