Hāto (ハート, Hāto) was a former student of En no Gyōja and the father of Shiranami.
He passed on the teachings from his sensei to his son, who was even more skilled than Hāto. Shiranami killed his father during the Third Shinobi World War trying to obtain the Tsuchigumo clan kinjutsu, which Hāto was protecting.
Hato had short spiked up black hair. He wore a black bracelet on each hand and shinobi sandals.
Hotaru has stated that Hāto was very skilled in ninjutsu. He could use the Tsuchigumo clan kinjutsu, which was strong enough to destroy an entire village.