Honkai: Continuing the Previous Civilization

(I'm going to write this seriously, without making it too abstract.) The Previous Era is a collection of serious problems. Its ending is heavy and painful: so-called salvation could save nothing. Empty dreams became nightmares, dawn's light was swallowed by darkness, the Mad King burned himself away, Heavenly Wisdom sank into nothingness, and the stars fell back to the earth.

The most cheerful one sacrificed herself, praying humanity might have a chance to win. The one who carried the heaviest burden chose to become something neither human nor ghost. The most emotional one sang a song atop the ruins, then shot herself. The one who pursued the spiral eventually came to believe she was guilty. The one who sought infinity vanished, her fate unknown.

The older sister couldn't protect her only younger sister. The most ordinary one carried endless pain and somehow kept living.

But surely, there must be some faint glimmer of light, right?