Nezuko's Role In Demon Slayer: A Force For Good Or Evil?

In her awakened form,.

Webas her brother tanjiro trains as a demon slayer in hopes of defeating a demon with powerful enough blood for a cure to be developed, nezuko has begun.

Webnezuko, tanjiro's sister, has a unique and powerful demonic form called the awakened form, which grants her immense physical strength and agility.

Webnezuko suddenly becomes stronger and faster and surpasses the 113 year old upper moon with centuries worth of combat experience under her belt.

Webnezuko'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.

There's no legitimate reason she shouldn't be in the last arc.

Webnezuko being involved can be used for compelling writing no matter the situation because she's the center of attention.

Webnezuko regains her strength by sleeping, which in itself is a quirk unused by any other demon.

Webdemon slayer depends on a concrete moral dichotomy (humans are good, demons are bad) for tanjiro and nezuko to restore the possibility of a normal life.