The Guardian of the Mist, Arrives!? is the 50th episode of the Katekyo Hitman Reborn! anime.
On Tsuna's side of the world, he is curious to know who is the Guardian of the Mist only to faint at the sight of Chikusa Kakimoto and Ken Joshima, members of the Kokuyo Junior High Gang. At the Vongola Headquarters in Italy, an attempted recon mission is enacted by Iemitsu to find out what happened to Vongola Nono. When Tsuna regains consciousness, he and his family find out who really is the Guardian of the Mist.