The Mist Guardian (霧の守護者来る!, Kiri no Shugosha Kuru!) is the thirteenth volume of the Katekyō Hitman Reborn! manga.
- Chapter 108: The Shigure Souen Style (Shigure Sōen Ryū, 時雨蒼燕流)
- Chapter 109: The Guardian of Rain's Message (Ame no Shugosha no Shimei, 雨の守護者の使命)
- Chapter 110: 8th Method: Pouring Rain (Hachi no Kata Shinotsuku Ame, 八の型篠突く雨)
- Chapter 111: Conclusion of the Rain's Victory (Ame no Shōbu no Ketsumatsu, 雨の勝負の結末)
- Chapter 112: The Guardian of the Mist (Kiri no Shugosha, 霧の守護者)
- Chapter 113: Chrome's Attack (Kurōmu Shūgeki, クローム襲撃)
- Chapter 114: Chrome Dokuro vs. Mammon (Kurōmu Dokuro VS. Māmon, クローム髑髏VS.マーモン)
- Chapter 115: Nagi (Nagi, 凪)
- Chapter 116: Mukuro Arrives! (Mukuro Kuru, 骸来る!)
Yamamoto shows the Shigure Souen Style, a swordsmanship style which allows him to manipulate the water from the underground. Squalo reveals that he already knows that style, and both develop their own variations. Yamamoto creates a ninth technique of his style and defeats Squalo, who is attacked by a shark as punishment of his defeat. Before the next fight, Tsuna sees Chikusa and Ken, and thinks the Mist Guardian will be Mukuro, but instead a girl called Chrome Dokuro appears. She fights against Arcobaleno Mammon, and both create illusions to fight, but Chrome is severely injured. Tsuna is then told of how Chrome had lost most her organs and that Mukuro has been sustaining her life. With Chrome unable to continue the fight, Mukuro appears in his own form and takes Chrome's place in the fight against Mammon.