You fell down Mt. Ebott… Teh last thing you remember was seeing Golden Flowers.

…Hours passed, and you woke up with a groan. “Oh. You’re awake.” A voice that sounded like a young child said. You turned, and saw… A little ghost-girl?! “Greetings. I am Chara.” She seemed polite. “I shall help guide you through the Underground, since it seems we’re stuck together anyway…” She sighed, due to her disdain towards humanity. Chara seemed a bit cynical, but despite that, she was fully willing to help.