The Assassin Awakens
Hunter x Hunter (Vol. 1-2: Hunter Exam) (1998)
Writer/Artist: Yoshihiro Togashi | Format: Manga Volume 1 & 2
Killua befriends Gon Freecss during the grueling Hunter Exam, revealing his dark Zoldyck assassin pedigree.
Why Start Here: The beginning of one of the greatest friendships and character arcs in anime history.
The Godspeed Masterpiece
Hunter x Hunter: Chimera Ant Arc (Vol. 22-28) (2005)
Writer/Artist: Yoshihiro Togashi | Format: Manga Volume 22-28
Killua pulls the needle from his skull, awakens Godspeed, and battles Royal Guards Youpi and Pouf.
Why Start Here: Togashi's greatest narrative triumph with unmatched tactical brilliance.
The Zoldyck Family Secret
Hunter x Hunter: 13th Chairman Election (Vol. 31-32) (2012)
Writer/Artist: Yoshihiro Togashi | Format: Manga Volume 31 & 32
Killua defies his family and flees with his reality-bending sister Alluka while hunted by Illumi and Hisoka.
Why Start Here: Emotional climax of Killua's independence and loyalty.