|This article is about a/an actor in Kamen Rider Ryuki.|
Ryohei Odai (小田井 涼平 Odai Ryōhei), otherwise known by his mononym Ryohei (涼平 Ryōhei) is a Japanese actor and voice actor best known for his role as Shuichi Kitaoka/Kamen Rider Zolda in Kamen Rider Ryuki, including in Kamen Rider Ryuki: Episode Final and Kamen Rider Ryuki Special: 13 Riders. He portrayed 2 characters in the Ultraman franchise; Kerus in Ultraman Max and Agent D in Ultraseven X. In 2017, he reprises his role as Shuichi Kitaoka/Kamen Rider Zolda in Kamen Rider × Super Sentai: Chou Super Hero Taisen.
After graduating from Kobe Gakuin University with a degree in law, Odai got a job at a telecommunications company. He appeared in his companies commercials, and after realizing how fun appearing on TV was, he quit his job and decided to become an actor. His first ever role would be as Shuichi Kitaoka in Kamen Rider Ryuki.
Odai then made his voice acting debut in the anime Mobile Suit Gundam SEED, playing Orga Sabnak.
On April 7th, 2018, he announced his marriage to TV personality Anna-Sophie Lennerfors. 
Kamen Rider Tiger Legend
Odai is also a fan of the Super Imaginative Chogokin figure series. He provided a custom design of a SIC-styled Kamen Rider Tiger Legend (仮面ライダータイガレジェンド Kamen Raidā Taiga Rejendo), modified from a regular SIC Kamen Rider Tiger as a special present for Hyper Hobby's readers in 2008.