Yūki Ono is a Japanese voice actor and singer born on June 22, 1984. He began his voice acting career in 2006. Before pursuing voice acting, he aimed to become a professional soccer player during high school and was even scouted by a team, but he stopped playing due to a bone fracture. He later attended Waseda University, where he became a fan of fellow voice actor Kishō Taniyama after meeting him at an anime event, which inspired Ono to seek a career in the industry.

He was formerly represented by the agency Atomic Monkey but now works as a freelancer. His career received significant recognition early on, and in March 2013, he won the award for Best Supporting Actor at the 7th Seiyu Awards.

Ono is known for a wide variety of major roles across many popular anime series. Some of his most iconic and well-known characters include Josuke Higashikata in JoJo's Bizarre Adventure: Diamond Is Unbreakable and Taiga Kagami in Kuroko's Basketball. His repertoire also includes Zenkichi Hitoyoshi in Medaka Box, Masayuki Hori in Monthly Girls' Nozaki-kun, and Jun Isashiki in Ace of Diamond. He has also taken on roles in long-running franchises, such as Ultraman Belial in the Ultraman Series and Shige Shige Tokugawa in Gintama.

Among the many roles listed in the query, several are confirmed by the search results. These include Bazz-B in Bleach: Thousand-Year Blood War, Belzebuth in I'm the Villainess, So I'm Taming the Final Boss, Rensuke Kunigami in Blue Lock, Jirō Ogasawara in Sasaki and Miyano, Shirō Ashiya (Alciel) in The Devil Is a Part-Timer!!, John H. Watson in Moriarty the Patriot, Haitora in Somali and the Forest Spirit, Kufa Vampir in Assassins Pride, Isami Aldini in the Food Wars! series, Haku (Gavin) in Mr Love: Queen's Choice, Koga Oogami in Ensemble Stars!, Kogarashi Fuyuzora in Yuuna and the Haunted Hot Springs, Louis in BEASTARS, Orter Mádl in Mashle: Magic and Muscles, Kazuichi "Pin" Arai in Kimi ni Todoke, Mira in The Magical Girl and The Evil Lieutenant Used to Be Archenemies, and Dennosuke Uchimura in Headhunted to Another World. His filmography also extends to other titles mentioned, such as Talion Drake in The Legend of Heroes: Sen no Kiseki Northern War, Chris in Phantom in the Twilight, Popuko in Pop Team Epic, Romio Inuzuka in Boarding School Juliet, Rintarō Tatewaki in Magic-kyun! Renaissance, Gran in Granblue Fantasy the Animation, and Saber (Richard the Lionheart) in Fate/strange Fake.

Beyond anime, he is also known for his work in video games, having voiced Gran, Lancelot, and others in Granblue Fantasy, as well as characters in games like Wuthering Waves and Arknights. In August 2011, he formed a voice-acting unit called You-Tak (later You-Tak II) with fellow voice actor Takuya Eguchi.