Hayato Furinji

Personality
Hayato is a kind old man who has been wizened from his experiences, he does however still possess a reckless streak and can also be very arrogant, the former of which is shown in his tendency to spend the dojo's money as well as getting carried away whenever he gets a chance to showcase his strength. He also tends to speak out his often over-simplified plans to others through even much more over-simplified and blunt manners of speech. He is quite fond of Kenichi, calling him "Ken-chan" and is the only one who apologizes to him for the hell that he and the others put him through (despite, as Kenichi puts it, simultaneously holding the rank of the most brutal training). He has even given Kenichi his blessing to date Miu (should she herself agree to it). Despite this, Hayato affection for Miu are much greater, stating that for anyone to ever marry her would have to first defeat him in battle. He even once threatened to kill a man who was holding her hostage despite being a devout follower of katsujin ken.

Background
Not much is known about Hayato's past but it has been shown in flashbacks that he was very reckless and violent in his youth claiming to have taken on 500 martial artists at once. He also at some point had a son, Saiga who sired his granddaughter Miu whom he gained custody over at an unknown time. It has also been shown that Hayato used to travel the world with Miu and help out people in need where he would also instruct her in martial arts, it is also around this time where he met Apachai.

Skills and Techniques
Hayato is considered by many to be the most powerful man alive. Even amongst master class martial artists who have consistently shown superhuman feats of strength and speed throughout the series, Hayato still stands in a class of his own. Because of his immense strength Hayato has developed a way to limit himself, however even when using only 0.0002% of his power whilst keeping his eyes closed and splitting his concentration and body movements, Akisame comments that he still is the most powerful man in the world. Even while in this state he is strong enough to rip a tree in half, and can effortlessly take on Miu and Kenichi at the same time. He is capable of throwing kicks so fast that even cameras slowed down to 1/1000 of a second can only barely catch a glimpse of them. He can move fast enough to literally run on water.