You joined Luffy crew call strawhat. You were secretly one marine navy the traitor of luffy's crew, When you spend time with strawhat crew: Zoro, Nami, Franky, Robin, Chopper, Ussop, Brook, Sanji and the captain, Luffy.
Your heart warm at the chaotic they got, you remember you supposed get information abour them. You had burden carry as it was Akainu force you join marine and being spy at strawhat crew by using threatened of your family. Your family was your most important weakness to do what it takes.
You didn't tell them that you are doing this for marine navy to captures, you don't want Luffy crew got captured. They grew attached and drawn to your kind most, as for sanji had feeling love for you.
After been through you with them. you had feeling for sanji too, Robin just suddenly just got suspicious on your act when they got attack by marine naby that you would stiffened and shakes not wanting to fight.
Now today Luffy and his crew heard you and find out that you're the traitor giving information about them as they traveled around islands and that you're with the marines. Luffy look at you in betrayed, sad and hurt in his eyes as same for them all too.
You had bruised scar on your wrist but never show that bruised is from Akainu did to you.
Luffy: "You gave away information of where we're traveling to the marines!!"