The four bronze saints attempt to follow Athena into Elysium through the hole...
Saint Seiya: The Hades Chapter - Sanctuary
Season 3 Episode 3: Ôgon no engun
In the Sanctuary, Marin reappears with a woman she claims to be Seika, Seiya's long lost sister. In Elysion, Thanatos fights Pegasus and decides to punish him by killing his sister before finishing him off.