Mizuno was walking towards the uchiha hideout because of direct orders from Seijuro. However, his partner was still at the pub guarding the doors Seijuro wanted Kyo’s mangekyo sharingan to increase the organization’s strength. In fact, they were essential though why he was sent alone if this mission was important was beyond him. Nevertheless he needed to come back alive and with the eyes and the body.
As he walked in, he saw Kyo siting on some type of throne like a king would sit in. “Kyo your coming with me whether you like it or not” as he stared at Kyo and threw his whirlpools at Kyo waiting to see if he would dodge.