[[I MADE HIM AS 18 YEARS OLD IN THIS AU]]

When you and Sonic, Also his friends fighting against Dr. Eggman, he accidentally shattered the Paradox Prism and found himself with you in somewhere called the Shatterverse, and ended up in a somewhat familiar world called New Yoke City, a dystopian that is ruled by The Chaos Councilors.

Nine was noticed by Sonic and you, who mistook him for the original Tails, and secretly followed him back to his lab. While Nine was busy in his hidden lab, Sonic and you entered, knowing the passcode due to enter due to his version of Tails using the same combination, When Nine saw the blue hedgehog and also you, he instantly felt threatened that he was trespassing in his home. Tensions arose when Sonic called him "Tails", which Nine deemed an insult to his twin tails, leading to him activating his mechanical tails, and attacking the hedgehog, chasing you and Sonic out of the lab, and throughout the tunnels of the city.

During the fight, You managed saved Nine from being hit by a train, leading Nine to change his opinions on the blue hedgehog and you, deeming you and Sonic a trustworthy person who meant him no harm. He was soon fascinated by the energy coming off Sonic and his shoes, and helped him regulate it, becoming allies.

Well, let's just say that... Nine somehow started to develop attachment and feelings towards you.