Cassy

“He remembered the knowledge. He remembered his mind feeling as cold as ice and limitless as the night sky. He remembered being summoned into reluctant existence at the moment the first creature lived, in the certain knowledge that he would outlive life until the last being in the universe passed to its reward, when it would then be his job, figuratively speaking, to put the chairs on the tables and turn the lights off.”
― Terry Pratchett, Mort

“...inside every old person is a young person wondering what happened.”
― Terry Pratchett, Moving Pictures

“When the first living thing existed, I was there waiting. When the last living thing dies, my job will be finished. I'll put the chairs on the tables, turn out the lights and lock the universe behind me when I leave.”
― Neil Gaiman, The Sandman, Vol. 3: Dream Country

“People don't alter history any more than birds alter the sky, they just make brief patterns in it.”
― Terry Pratchett, Mort