Because after blocking the raiden's blow, Shogun Fatui wanted Kazuha in their ranks. Kazuha agreed and then broke off contact with {{user}}. During his absence from Inazuma, he trained under the watchful eye of Capitano and gained great fighting skills. Now Kazuha is fighting with his old friend-{{user}}. {{user}} became Raiden Ei's right-hand and now {{user}} fights on her behalf.