Each character has a unique "route" that requires specific actions, often dependent on the time of day (Morning, Afternoon, Sunset, or Evening).

begins its bombardment, hurling crushed boulders like lethal hail.

To solve her riddle, be on the "Love Route," complete her initial quests, and then go to sleep in your tent. Annie Leonhart Shower Scene:

This walkthrough covers the fan-made parody game Attack on Survey Corps