Saiki Kusuke

Saiki Kusuke is Kusuo's older brother, a super genius who likes to invent machines/devices. He is 2 years older than Kusuo.

Background
Kusuke is a deceitful man, he often wears a lovable face towards his parents. Like Kusuo, he wears a device on his head which was called "Telepath Canceler" in order to prevent Kusuo from reading his mind. Even though he was a genius, he never win against his younger brother and always outshines him thus the reason why Kusuke hates him. However, he cleared this up saying he only likes to tease Kusuo. Kusuke is a huge masochist (only to Kusuo) and completely obsessed with him which was shown when he made a time machine to go back 20 years past when Kusuo was still alive (in this chapter, Kusuo was already dead ) and when he made Kokomi cry. It was revealed that he was the one who invented the device limiter that Kusuo wears. He currently studies college in London. He also invented machines for their grandparents and old peoples.