A Shadow Approaches! The Gold Saints That Protect Athena!

Athena, Seiya, Kiki, Fudo, and Harbinger are attacked by their former Gemini Gold Saint ally turned Secondary Pallasite Paradox. Integra, the new Gemini Saint and Paradox's twin sister, arrives to protect Athena and settle their score. Once defeated, Paradox is forgiven by Saori and reforms, just to be later fatally wounded by the Primary Pallasite Gallia.

Synopsis excerpt via Kitsu.