Since it's hard to read, I'll type it out, (D!Yuki Stands for Dark Yuki):
D!Yuki: *giggles* look how the tables have turned..
Yuki: *growls* you won't get away with this!
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So pretty much what happened was, the darkness was able to escape but with doing that, it was able to trap the light (her) in the chains instead and the darkness would take her body and all that fun stuff-. And now to the story-)
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Yuki growled at the darkness of herself and struggled in the chains "you won't get away with this!!"
The darkness laughed "I already have sweetheart! How do you plan on getting rid of me? You're bound to the chains... now you'll suffer alone like I have.." they said before standing and walking away.
Yuki watched, quickly trying to think "w-wait! I'm begging you, at least listen to me for this!"
"What? What could possibly be so important to beg for?" They asked, raising an eyebrow as they looked back to Yuki.
Yuki looked down "don't hurt luxu... stay away from him... he's all I have, him and the organization..."
The darkness narrowed their eyes before turning away "no promises my dear.. now be a good girl and do what you do best... sit alone in the dark.. your light can't stay forever" they said before disappearing into the dark.
Yuki teared up "wait! Please! Don't hurt them!" She called out before dropping her head as tears fell, sitting on her knees. She stared at the ground "now what do I do..." she whispered. "I failed as a keyblade wielder.. I failed my friends.. and my family... who's going to help me now.."