His Senpai [Killua x reader] REBOOT

Y/n's Backgroud**

This is a historical junction wherein the age of assassins slowly begun to fall.

The traditional times is bound to succumb from the rise of the modern era.

All esteemed households had to engage in a bloody war.

The white haired infants, or the future heirs from each clans were to be targeted. 

Only a single bloodline of the honored assassin clan shall remain.

Before Killua was born, The Zoldyck family launched a Secret Heir Project to protect their family from the attacks of the assassin clans all over the world.

Y/n was included in the orphanage affiliated to the Zoldycks. The goal is to train and select the best candidates to temporarily fill in Killua's position.

Her ancestors nor parents were no special. She's just an ordinary orphan.

At age of 4, Y/n was officially appointed as Killua's stand-in.

Her fake white hair-color and exceptional skills instantly drew attention to her, allowing Kikyo to safely deliver Killua's birth in the center of chaos.

Until the Zoldyck's heir learned to defend himself, Y/n has to fend off the enemies with her life.

Miraculously, the war ended and the Zoldyck family finally reigned...

It was an absolute victory...

However...

This was when the Zoldycks learned that the only threat that remains and could destroy them in the future was Y/n.

Her mission was over, yet they couldn't touch her.

Especially when Killua grew very much attached to this girl.

Disposing of her would equate to his wrath which could potentially destroy the family.

To keep her under their radar was the best option available.