Who are the Twelve Kizuki?
The Twelve Kizuki is the strongest Demons in Demon Slayer, they are divided into two, Lower Ranks and Upper Ranks. However, The Upper Ranks are the strongest.
Demon Slayer Upper Ranks
Demon Slayer Lower Ranks
How To Recognize Upper Ranks and Lower Ranks in Demon Slayer?
All the Upper Ranks have a number in both of their eyes, while all the Lower Ranks have it only in 1 eye.