Boruto, Episode 186: "How You Use It" Episode 186 of Boruto is perhaps most significant for bringing back Ao. He came back not as a Shinobi, but as a tool whose only job is to obey commands.

If you read the Boruto manga, you will know exactly why these coming episodes in September are big. The title of episode 216 is “Sacrifice” which aligns perfectly with chapter 51.