Why is Nezuko stronger than regular demons?


In manga #83 it is mentioned that

> Nezuko's regeneration speed matches that of an upper moon, and later it's
> mentioned that it surpasses the regeneration speed of one of the upper
> moons.

Also, Nezuko has shown to be stronger than an average demon before, when she
kicked those strong demon balls for example. Why is Nezuko stronger than
regular demons, considering she neither has martial art skills, nor consume
humans to get stronger?




It was referenced by several demons (starting with three-horned demon with
clones), that she seems to be strong due to amount and quality of demon blood
she was injected with to be turned into a demon. Other possible reasons were
not specified so far.




@lentinant Already mentioned one of the reasons why Nezuko is stronger than
most other demons. It's because she was able to survive after taking a large
amount of blood from Muzan Kibutsuji.

Muzan Kibutsuji may have tried to kill Nezuko by exploding her after injecting
a lot of his blood into her veins. But she was somehow able to survive with
that much of Muzan's blood, that's what possibly made her a powerful demon.

In one of the episodes, we see Muzan Kibutsuji frightened of Nezuko and
Tanjiro's past relitave when he found the same earrings and scar on the face
and ears of Tanjiro.

Apart from that, I would say her father was possibly a Demon Slayer too, maybe
he was researching rare herbs or plants that could protect humans from
becoming flesh eating Demons. He was maybe able to create a vaccine with which
a human can control his/her will after becoming a demon too. He could have
injected his family with the vaccine because he knew Muzan Kibutsuji would
come after him & his family in future.

There may be some limitations on a vaccine, like how it should be injected
before becoming a demon.

