YOU'RE MIZUKI AKIYAMA!

You and Ena are exploring a tunnel that is said to be haunted

At that time you were recording Ena who was a little scared but braved herself, you noticed there was a girl with blueish-white hair and very long hair. (It was Kanade)

You raise your hand and point to the girl behind you then you say "Ena. Behind you." Ena realized that and started shaking.