Backstory
When the Gods created the Miseries, evil Gods to intimidate humans into worshipping for protection, they'd also created Eden. Originally, A woman named Pandora was assigned to watching over the large, golden box in Greece, but her curiousity misled her as she unleashed unimaginable dangers to the world. Many lost their lives, their humanity, smoke filled the air as chaos broke out. Within the turmoil, hearing a cry from the empty box, a group of humans came upon Eden, the Hope that'd save them all. If bad things exist, a good thing should exist to counter it, that balance was created with Eden existing, a force that multiple Miseries couldn't overpower.
As a child, Eden smiled around everyone, not having time to share tears or extend pity because she was the solution to every problem. She appeared human, lived like one, but her presence was a blessing that brought fruit to the land, to people afflicted by the Miseries. If a Misery made one feel strong loneliness, Eden became a friend. If a Misery gave someone terrible dreams, she blessed them with sweet dreams. If someone was left in despair, Eden was their Hope. Of course, she couldn't stay in one place if the rest of the world needed saving, so she grew up meeting those who raised the next lines of Pandoras, humans blessed by Gods to see deities and seal the Miseries. While she had no family by blood, always raised by a group of humans, Eden felt the Pandoras were all her siblings, those who shared similar roles between the world of mortals and the spiritual.
As far as the Miseries that had escaped, some of them were resealed by Pandoras into their own individual "boxes" ranging from clocks, instrument cases, perfume bottles, etc. but some of them had escaped their second prisons and ran free. Some weren't resealed at all like Ephialtes. Eden recalls seeing the tall and terrifying God when she was younger, one who gave humans bad dreams, but she'd also seen them fight against an even more powerful God like Isiktan and lose to them. Isiktan was a reincarnation God who'd sacrificed their power against three of the Miseries they stumbled upon, all four of them losing their strengths, but Eden was always fascinated by the courage Isiktan had. The weakened Miseries ran away, now appearing as children, but Eden noticed two of them ran together while Ephialtes was on their own. Perhaps she felt some kind of pity towards the lonely Misery, and if she shared the same origin as them all, wouldn't they be bretheren to her? Were they not chaotic, she would have liked to feel a kinship with them.
From then on, Eden worked together with Isiktan, a reincarnation God annoyed that the other Gods created such unrestrained children into the world. Frankly, all the deaths they'd cause made a laundry list of work for the God that was getting out of hand. The sooner the duo of Miseries were sealed, Merikh and Pagule, the better the world would be for everyone else. Those two Miseries of Death and Plague in particular, were short fuses that'd curse humans left and right rather than simply gather power by absorbing humans' issues like the other Miseries did. Curses were the worst of the worst, generational maledictions that Eden couldn't stop if the first human afflicted had passed already. She could counter any ailment from an evil god, shield them from their presences, but curses were unstoppable unless the God undid them. There were lineages fated to die young, lineages cursed to bear the same illnesses that weren't naturally hereditary. The pair didn't stop there, ultimately aiming to destroy all of humanity.
Eden wondered if she was the only one alongside Isiktan's faction that could confront the Miseries, not wanting to let the young Pandoras be in harm's way. She'd run into Ephialtes one day who informed her of Merikh and Pagule's terrible plans, including gathering the other Miseries for an alliance of evil, although Ephialtes was scorned by the pair so they wouldn't join. Unable to catch Ephialtes in that moment, Eden wondered if they too intended to gather a group, staying in the area Ephialtes was lurking in. Pinpointing a temple where Ephialtes was tampering with a human's dreams, she stayed to protect the human, but was too late in stopping Ephialtes from unsealing their comrade, Chimare. If she was going to win against the troublesome Miseries, she needed to think ahead of them, to confiscate all the sealed Miseries before they can be found by their fellow Gods. She wouldn't have hesitated in doing so alone, but Gingko and Yinpei insisted on helping after personally being affected by Ephialtes' schemes.
Growing close with the two humans, she realized they were very likeminded and similar despite their different upbringings. With their spiritual abilities being good enough to train them as Pandoras, beings that can seal the Miseries, Eden took up their offer on searching for the sealed miseries, leaving the tracking down to Eden or the existing Pandoras. Throughout their journey, they come across Ephialtes' team or Merikh and Pagule briefly, collecting sealed Miseries as they go. They learn some are already unsealed, living peacefully among humans, some still causing trouble on their own. With the ones they capture and have at their sides, Eden finds some to be level headed and friendly, and some not so much initially. If Merikh and Pagule are the greatest enemies, teaming up with Ephialtes may not be impossible in the future. If Gingko's wife is in Ephialtes' team as well, perhaps they could bring the two groups together. Eden is willing to work together, but earning Ephialtes' trust is a challenge of it's own, unless the human with them can sway them.