sentences:  After he is defeated by Gamma, a commander of the rival Millefiore Mafia family, and is saved by an adult Kyoya Hibari, Yamamoto undergoes training with Reborn, after which he creates two new Sigure Soen Ryu forms and learns the secrets of the Arcobaleno.After Yamamoto is defeated by Genkishi during the attack on a Millefiore base, an older Squalo returns from Italy to train Yamamoto and convince him to devote himself to swordsmanship.He is chosen to be one of the combatants in the Choice game, easily defeating a disguised Genkishi and failing to defeat the target in time to win the game.