A girl witnessed it first hand. What did this girl look like? She had long black hair that seemed to touch the floor with ease with golden colored braids dangling down from each side of her head. Her outfit was a light shade of blue (much like her right eye) with a giant white ribbon in the front with many white diamond patterns as details.
What has this girl witnessed exactly? She witnessed a future where her and her evil alterego were left alone. Alone to die. No others around. A future no one in the entire universe would ever want, that is except for the alterego. This alterego often took the appearence of a young girl with long black hair (also touching the floor) with a grey/white graident tone to the hair. Her eyes glowed a dark crimson, accenting her also crimson and white colored outfit.
Before the girl witnessed this tragic ending her friends were helping her find answers. Answers to what? That you will have to wait to find out.