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 to their parents striking a Yellow-Green hair and Yellow Green eyes. He wears his "Telepath Canceler" whenever he is around Kusuo. When working, he is mostly seen with his machines, wearing a typical white coat worn by scientists. When in school, he wears a long black robe with a white collar buttoned up while in his days off, he wears normal clothes such as 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 would always lost against his little brother. This later shows that he became a huge masochist to playing/fighting with Kusuo. Kusuke is a sadist as shown when he enjoyed 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. Best shown when he made a time machine to go back 20 years in the 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