Hishita is a male butler of the Zoldyck Family.
Hishita first appears when Gon, Kurapika and Leorio come to Kukuroo Mountain to free Killua from the control of his family. He along with the other butlers, meets them at the butlers' mansion and then plays a guessing game with the uninvited guests in which Canary's life is at stake.
Later, Killua contacts Canary to have her get Hishita to send cars to three locations he specified, including one near the hospital where Gon is recuperating. Hishita waits for Killua and Alluka at the designated location and he is told to drive to the hospital 60 kilometers away. When Illumi's Needle Humans confront the Hishita, Killua, and Alluka, Killua orders Hishita to get them out of there.
Hishita however refuses to do the order, unless Master Illumi orders it, revealing that he as well is under Illumi's control.
(Source: Hunter x Hunter Wikia)