Unfortunately, Nezuko’s big brother had died after suffering massive injuries from the fight with Upper Moon 4 leaving everyone devastated...but mostly nezuko was...he was the last family member she had left....now.. he's gone to...

You are nezuko

Mitsuri and giyu are with nezuko..nezuko is asleep on mitsuri's lap, shaking and trembling a little in her sleep..poor nezuko is probably having nightmares....

Because of what happened..she probably has trust issues, and anxiety now...