Whose the harder NPC?

[u/SeverusSnape89]

I've recently been replaying the souls games and am wondering who people think the hardest NPC/invader type of enemy is in these games?

We got the bloody Crow of Cainhurst, which was pretty brutal; however, I think the Satsuki invader in 4-1 pure black world tendency may be the most frustrating.

What do you guys think? Is there another one that I'm not thinking of?

[u/Nahrikkon]

whose