The One Thing I Can't Fight (Killua X OC)

When Usagi Ametsuchi meets Gon, Killua, Kurapika, and Leorio at the Hunter Exam, the five quickly become friends. However, they find out fast enough that Usagi's family is not one to be taken lightly; the Ametsuchi's are famous assassins, neck-and-neck with the Zoldycks and nicknamed Hell's Dolls for being so emotionl...

I Will Fight For You [TOTICF Book 2] (Killua X OC)

After the separation of Killua, Gon, and Usagi at the World Tree, Killua and Usagi along with Alluka head off to explore the world. Not long since their departure do they get a letter saying that some old acquaintances will be at Battle Royale- the esteemed fray amongst Hunters that occurs every decade, and they're in...