Ichinose grew up in America alongside Aki and Domon, and he's pretty much defined by one major goal: making soccer huge in the United States. He showed up during the FFI arc as part of the American team, The Unicorn.
Even after moving on, Ichinose left an impression. In Inazuma Eleven Go, Tenma mentions him in both the game and anime, so fans still remember him as part of the series' world.
His signature moves are all over the place depending on which season you're looking at. Early on, he had basics like Spinning Shoot and Spiral Shot, then got into team combinations like Tri Pegasus, The Phoenix, and Final Tornado (all with Endou and Domon, sometimes adding Kidou and Gouenji). Later seasons brought Flame Dance and Twin Boost, before he settled into Pegasus Shot, Emperor Penguin No. 2, and Gran Fenrir as his go-to techniques.
Content compiled by AnimeList.moe from publicly available sources.