Saiki Kusuke

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

Appearance
Kusuke, like Kusuo, was born with a different hair color than their parents striking a Yellow Green hair and Yellow Green eyes. He wears his "Telepath Canceler" whenever he is with Kusuo. When working, he is mostly seen with his machines, wearing a typical scientist white coat. When in school, he wears a long black robe with a white collar buttoned up while in his days off, he wears normal clothes like t-shirt and pants.

Personality
Kusuke is prideful and competitive when it comes to Kusuo and would do anything to win against him when they were kids however, he always lost against his little brother which shows later that he became a huge masochist to playing/fighting with Kusuo and is also a sadist as shown when he enjoys seeing Kusuo, Kaidou and Nendou being chased by crowds of people. Kusuke is also obsessed with Kusuo and is shown to be attention seeking and selfish as 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 saying that Kusuo and Teruhashi are not fit together.

He is also deceitful always showing an angelic smile towards their parents and like Kusuo, ignores his father. Kusuo always thought that Kusuke hated him but he cleared this up saying he only likes to tease Kusuo.

Trivia

 * 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.
 * He has an IQ of 218