It was complicated, but if someone's respective Heartless and Nobody were both defeated, they should reunite and bring the person back to normal. However, it was rarely so easy for that to happen.

"It all depends on what kind of magic might have caused it," Sephiroth replied. "We're approaching his house now."

A man in his twenties was standing outside the house, shaggy brown hair hanging in his eyes. "Hey. What's up?" he asked, seeing the procession approaching.

"Hello," Sephiroth greeted. "We're here to see Merlin. Is he in?"

"Yeah. Just go on in," the younger man replied, jerking a thumb over his shoulder.