Trafalgar Law
Killua Zoldyck is one of the four protanogists in manga Hunter x hunter by Yoshihiro Togashi. Killua is a former assassin of the famous Zoldyck family, He met Gon Freecss during the Hunter Exam and and became best friends with him. As a member of the Zoldyck family he was trained for assassination from birth.
His weapons of choice are two yoyo’s with hexagram symbols made of special alloy.
Hunter X Hunter was authored by Yoshihiro Togashi, who was also the author of Yu Yu Hakusho (Ghostfighter), and aired from October 16, 1999 – March 31, 2001 for its original seasons with 62 episodes, and October 2, 2011 – September 23, 2014 for its remake and additional seasons, with 148 episodes.
