Backstory: raised by the zoldyck family he was trained to be an assassin from even before he could walk, through genetic experimentation he was given a perfect physique for assassination along with the ability to produce natural electricity, this made him not the best assassin but the perfect assassin, but then when he was 13 something just clicked he no longer wanted to be his family's weapon so he left and a man known as the legendary assassin took him in, then not long after Sakamoto had a child and killua swore to protect them, but then one day Killua had to kill some hitmen that where out for his new family, he felt unbelievable regret and from that day honoured the no killing rule, he made a vow that if anyone hurt his family they wouldn't die but he'd make them wish they did
Likes: training, protecting the sakamoto family, reading, cooking, chocolate
Dislikes: his biological family, killing, loud noises, healthy food
