Hollow Mizuki (ホロ水樹, Horō Mizuki) or more be known her name as Mizuki Shirosaki (白幸'水樹' Shirosaki Mizuki) is a powerful entity that was created when Yugi Mizuki, a Shinigami, developed a Hollow inside her soul, a commonality among the Visored. Currently, she's now having her own Gigai and lived together with Yugi but sometimes will back to Yugi's inner world again if she needed.