Dancer, middle child of the group. He has train autism an immense love of trains and prides himself as being the "best railway otaku dancer in the world". He is the president and owner of his fictional railway company, “Souto Rapid Railway”. His special talent is doing a perfect train announcement impression of every train station in Japan, even the local ones. He does this as his introduction in live shows.

He has his own youtube channel for his railway hobby, and he often appears in various media/TV shows pertaining to trains in Japan as a "railway otaku personality". His favorite transit line is the Tokyo Metro Touzai Line, and his favorite type of trains are commuter trains, such as rapid and express trains. He often does collaborations with the Japan Railway (JR) company, in which he does guided train tours and acts as a "train conductor" for a day.

He has a personal rule of recording the details of every single train trip he goes on, including the station, train number, station he gets off of, the time the train arrived (if the train arrived late: why did it arrive late) etc,. He has been doing this since he was 18 years old, and as of 2025, he has six full notebooks of these records. He often writes blog posts on ameblo and will regularly report his train trips and answer fan submitted questions related to trains and railways there.

Aside from trains… He can play the piano and has been playing since he was 5 years old. He often plays the piano on stage during SUPER★DRAGON concerts or other events.

He is not particularly aware of this himself, but Sougo is someone who hates losing, according to the other members. During SUPER★DRAGON's 2025 academic evaluation test, he got a perfect score in the maths section. He is the only member who has never had a pet, as he doesn’t do very well with animals. He has a penchant for making dad jokes. He is perhaps the second most (lovingly) bullied member after Reo.

The member that took me the longest to get to know better. The more I got to know him, the more I've really come to like and respect him. I admire his passion and dedication to the things he loves. His love for trains rubbed off on me, and I think about him every time I take the train and have come to appreciate the little things about train trips more. My favorite thing about him is his confidence in himself and the things he likes. He is something of a “token Normal Guy” within Supadora, which is his charm, but I also think it’s a bit of a disservice to call him that (he’s not just a guy he’s THE train guy!). I also think he's a very cool dancer!