Tifa

Zack is a Final Fantasy character that makes his debut in Kingdom Hearts II. She originates from Final Fantasy VII.

When Sora's revisits Hollow Bastion for the first time, he meets Tifa, who inspects Ansem the Wise's study, looking for "a guy with spiky hair." Sora pulls on one of his own spikes before Tifa laughs and says "Spikier".