Alejandro Saab (born November 15, 1994) is an American voice actor, YouTuber, and VTuber under the name CyYu. He primarily voice acts to English-language dubs of anime and video games. Some of his noteworthy roles include Gabimaru in Hell's Paradise: Jigokuraku, Anton Ivanov in Zenless Zone Zero, Takezo Kurata in Kono Oto Tomare! Sounds of Life, Kazuki Yasaka in Sarazanmai, Izumi Miyamura in Horimiya, Tatsuya Shiba in The Irregular at Magic High School, Cyno in Genshin Impact, Jing Yuan in ', Sae Itoshi in Blue Lock and Cheng Xiaoshi in Link Click.
Saab was born on November 15, 1994. He was raised in Guayaquil, Ecuador and can speak Spanish. He is also of Lebanese and Cuban descent. In high school, Saab decided he wanted to pursue a career in voice acting. He later was cast in his first role as Drake in Fairy Tail. An article published by Crunchyroll on 5 February 2025 revealed that Saab voiced 22 anime characters in 2024, of which fourteen were supporting roles.
In July 2021, Saab became engaged to fellow voice actor Hayden Daviau. In 2022, the pair married.
Outside of voice acting, Saab ran a YouTube channel under the name of KaggyFilms until 2023, where he posted anime-related content. On July 30, 2021, he began streaming on Twitch as a VTuber named CyYu (short for Cyborg Seiyuu). On March 16, 2023, it was announced that he joined the content creator management company Mythic Talent, a subsidiary of One True King.