|Title|| Namimori Transfer Student|
The Hospitalising Devil Kaoru
|Manga Debut||Chapter 284|
Kaoru Mizuno is part of the Shimon Famiglia and attended Shimon Middle but had to migrate to Namimori after an earthquake struck their place of residence. Namimori was chosen because the area has a low Earthquake frequency and were travelling there anyway because of the Decimo Inheritance Ceremony. He teamed up with Yamamoto to protect Tsuna from an unknown Famiglia trying to stop the ceremony.
Many people are scared of Kaoru because of his stature and height, and has been described as a "hooligan"; however when a person gets to know him they see that he is actually a shy and timid person. Yamamoto was the first one to call him his friend, to which that made Kaoru extremely happy to the point of tears.