≪•TWISTED ❈ TWINS•≫ HxH x OC (killua twin)

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"Just promise me one thing, 'kil."
"Hmm- what is it 'zulli?"
"We'll be a team...forever. No matter what."
...
"Yeah, I promise."
┗━✦❘༻❈༺❘✦━━┛
≈☆
Kazulli are Killua are the twins in the most infamous assassin family, the Zoldycks. Ever since early childhood, the two were a sneaky and sinister duo, completing missions with ease together- and causing chaos in the Zoldyck mansion- but other than that, they were very skilled assassins. And loyal siblings.

≈★
After Killua came home from failing the hunter exam, (he obvi got tortured by milluki-) his father assigns an extremely strong yet creepy bodyguard to serve both him and Kazulli, in case the two of you try to go off and try to escape the mansion. The twins try to trick and sneak past the bodyguard multiple times, the main reason being that killua wants to see his friends again (mainly Gon). Yet, their many plans don't work, and they need to figure out how to leave.

(Basically me making the Zoldyck Family arc better)
(All characters are from Hunter x Hunter, owned by Yoshihiro Togashi)