Gloria Union: Twin Fates in Blue Ocean is a tactical role-playing game for the PlayStation Portable, developed by Sting Entertainment and published by Atlus. It is a spinoff to Yggdra Union, and including Yggdra Unison and Blaze Union is the fourth installment in the Union subseries to Dept. Heaven. It was unveiled in Famitsu magazine in late March 2011 and released in June. A remastered version for mobile platforms and the Nintendo Switch was released in March 2021 in Japan.

Ai Nonaka is a Japanese voice actress and singer. She works for Aoni Production and was formerly a member of the voice actor unit Drops, which included fellow voice actor Akemi Kanda, Tomoko Kaneda, Mariko Kōda, and Ryōko Shiraishi. In high school in Fukuoka, she was head of the drama club and her ambition was to play male roles in the famous all-female Takarazuka Revue.