Kōki Uchiyama (内山 昂輝) Uchiyama Kōki is a Japanese actor and voice actor from Saitama Prefecture. He is currently affiliated with Gekidan Himawari. Uchiyama mainly voices over young males, such as in the Kingdom Hearts series, and rarely makes public appearances in the media as a voice actor. He is best known for his roles in the Kingdom Hearts series as Roxas and Ventus, Soul Eater as Soul Eater Evans, Mobile Suit Gundam Unicorn as Banagher Links, The World Ends with You as Neku Sakuraba and Yu-Gi-Oh! Zexal as Kaito Tenjo.