Apart from the main brother-sister duo in the Demon Slayer series (Tanjiro and Nezuko ... Daki along with her older brother Gyutaro are the former Upper Moon Six Demons and were the main villains ...

For most of Demon Slayer’s Hashira Training Arc ... In the Infinity Castle Arc, he encounters Kaigaku, a newly turned Upper Moon Six, and fights him alone. Kaigaku was already strong before ...

Demon Slayer is one of the most successful Shonen ... the series takes down enemies on his own and his defeating the Upper Moon Six is proof of his ability. Inosuke’s lack of both human contact ...