°Inseparable°

&quot: "Onii-chan promise me you'll come back. "
"I promise!!"
What happens when Luffy finds out he has a sister? Will he accept the fact that he does, or will he think nothing of it, but most importantly was will his crew think of it? What will Zoro think of it? What will Ace and Sabo think of it?
Zoro x OC

(AU)
Note: Plots may not be the same.