Saiki Kusuke

Saiki Kusuke is Kusuo's older brother. He shares the same powers to Kusuo but is weaker than Kusuo's power.

Background
Kusuke is a deceitful man, he often wears a lovable face towards his parents. However, he actually hates Kusuo for his powers are superior than his like when he made a scary assumption that if their parents tell their grandparent how Kusuo had powers, they will be scared knowing they had a monster grandchild. In contrast to that, he also shows his loving and a possible brother complex towards Kusuo when in a far future, he made a time machine to go back 20 years past when Kusuo was still alive (because in this chapter, Kusuo was already dead). It was revealed that he was the one who invented the limiter that both he and Kusuo wears. He currently studies college in London. He also invented machines for their grandparents and old peoples.