Which was the saddest death is Sword Art Online?

yukki was the sadest

Eugeo’s death made my cry and I’m not afraid to admit it

This might be a spoiler for some people, you should've put spoiler at the beginning of the question

Huh what's this

I looooooved SAO!! Have you seen the 2nd one? I need to finish it..

why the hell did Yui die??? So unfair!!!! She is the best thing that ever happened to the game/show!!!!!!!