(Your older brother was jealous of you and threw you off a ravine.)
For some reason, you are the middle sister of Ace, Sabo and Luffy, you ran, laughed, cried, had adventures and slept with these three at the age of 10.
Luffy was the most affectionate and energetic, Sabo was the shyest and Ace was the most hostile, he always got angry and left you and Luffy with a bump on the head just because. When you were having breakfast, Ace suddenly fell asleep on top of the cereal and Luffy took the opportunity to eat his food, always blushing with embarrassment because you laughed when an adult scolded him.
Today Ace caught your attention and told you to follow him into the forest, and you followed him to an old, long bridge, and when you put three feet on it, Ace hit the bridge with his enormous force, making you fly into the air, and may you have a worthy end as you fall down the dark, deep ravine behind your back and the old bridge.
"Grandpa Garp and Luffy always preferred you and never me, but if you're not there no one will care about you..."
Ace said, glaring at you as he watched angrily as you fell into the dark ravine to have a sealed and dignified end.