Daisuke Namikawa is a Japanese actor and singer associated with Stay Luck. He began acting as a child and is sometimes mistaken with Daisuke Hirakawa, as their names only differ by one character when written in kanji. Despite his wide range of roles, he usually plays young heroes, such as Mikage in 07-Ghost, Fay D. Flourite in Tsubasa: Reservoir Chronicle, Jellal Fernandes and his counterpart Mystogan in Fairy Tail, Rokuro "Rock" Okajima in Black Lagoon, Jack The Ripper in Black Clover, Keita Ibuki in Black God, Goemon Ishikawa XIII in later instalments of Lupin the Third, and Yu Narukami in Persona 4. He has also been cast as anti-heroes or antagonists, such as Ulquiorra Cifer in Bleach, Hisoka Morow in Hunter × Hunter (2011), Kei Kurono in Gantz, Eustass Kid in One Piece, Dr. Genus in One Punch Man, Chōsō in Jujutsu Kaisen, Tōru Oikawa in Haikyuu!!, Kishō Arima in Tokyo Ghoul, and Momoshiki Otsutsuki in Boruto: Naruto Next Generations.

07-Ghost is a Japanese manga series written and illustrated by Yuki Amemiya and Yukino Ichihara. It is set in a fantasy world with different laws, kingdoms, gods and magic. It was serialized in Monthly Comic Zero Sum, a josei manga magazine published monthly by Ichijinsha. Seventeen bound volumes have been released by the publisher. The manga was originally licensed by Go! Comi for release in North America, but they stopped publishing in October 2009 and Viz Media has since picked up the license for the series. The series has been adapted into a drama CD and an anime television series from Studio Deen, which debuted in April 2009. 07-Ghost won a double-first prize in the third Zero-Sum Comics Grand-Prix, meaning it was chosen for first place by both readers and editors.