Who said "The last word was always goodbye."?

This quote is attributed to Death.

The last word was always goodbye. - Death

"The last word was always goodbye."

Death

Character in The Book Thief

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"I have hated words and I have loved them, and I hope I have made them right."

"The consequence of this is that I'm always finding human bones at number 33."

"I am haunted by humans."

"She was a girl who decided to steal books."