White Phantom has pale gray-brown hair worn in two long, thin ponytails. She is particularly notable for her eyes, which are black with pale brown irises, and a pair of green horns which protrude from the back of her neck. She also appears to wear a green, teardrop-shaped jewel on her forehead. She wears a white uniform with flowing sleeves and black and green accents.
When King JinWon (Won Lee) prepares to leave the palace and calls for Black Wolf, White Phantom appears instead. Won Lee tells her to get ready because they are going out. When she asks where he intends to go this late at night, he replies that they are going to JuWah.
After Nabi makes her getaway and Won Lee exits from Doctor Ma's clinic, White Phantom suggests that they return to the palace since the court will be convening shortly, but he chastises her for allowing Nabi to leave alone. She replies that the BiYong Palmu only shadow the king unless he commands them to reveal themselves. She asks His Majesty for his forgiveness, but he responds that she is lucky he is without his sword, causing her to sweat nervously.
When Won Lee decides to destroy the slum village, he calls upon White Phantom to summon the royal guard.
When Won Lee arrives at JinHee Palaces looking disheveled, Black Wolf demands a report from White Phantom, who responds that she left his side briefly while she led the royal guard. Black Wolf takes responsibility for their lapse in protecting the king.