Lu Zhang is a member of the Yellow Heads.
Lu seems to be fooled easily by tricks. When Wuying Ren and Ryo Hazuki are handcuffed together in a cell of the Dancing Dragon Building, Ren tells him that Ryo is dying. Lu believing the trick, opens the door only to be knocked out by them.
If Ryo and Ren get put back into the cell, Ren tells Lu as he is walking by that they'll tell him about Yuanda Zhu. Once he opens the door, he doesn't see them so he believes they have escaped. They were actually hiding next to the door and knocked him out unseen.
- Lu's zodiac sign is Leo and he has a B blood type.