Backstory
Since Saros was born, her family already knew what lied ahead of her in life, and so did a certain God who was always at her side. She grew up with her mother until it was her turn to do the duties of a Pandora, keeping evil Gods in check and learning to seal them if she runs into a dangerous one. And yet, her lineage unsealed one such God generations ago, allowing the Misery named Reynaru to live alongside them like any other family member. Having seen Saros' ancestors pass away or retire from their duties once they had kids of their own, Saros' existence to the God could be considered a fleeting one compared to their long life, but that never stopped them from cherishing each day together.
Saros grew up embracing her life even with the duties put on her, afterall knowing she would never be alone or without a guide to navigate the world. This companionship made it tolerable to live by herself in a temple when her mother retired from her duties, since Reynaru was around. Ironically, they were one of the Gods meant to be sealed, but Saros was never afraid, rather, admiring all they taught her. Honing her skills each day, the two lived a quiet and peaceful life, mutually beneficial to the other.
She never had siblings or grew up the same way other children did, eventually her mother passing away for natural reasons. But, strong minded, she didn't mourn very long if she knew her mother and those around her wished for her happiness. She was a happy person, glad to have known her mother in the first place, so others knew not to worry so much about her. Her mother was similar in that aspect, knowing she could pass away in peace having raised such a resilient daughter.
As her days continued with Reynaru, Saros could hardly remember any time that she was inconvenienced. Reynaru was a prankster sometimes, but jokes can always be laughed at afterwards, and she trusted them enough to know they wouldn't bring her harm. Still, she always wondered what the other Miseries and Pandoras were like, briefly meeting other Pandoras that didn't live alongside their assigned Miseries. In fact, how could the other Miseries be so evil if Reynaru wasn't. If they could live with humans as they did, surely they must have some humanity in their beings. She didn't worry about it, Reynaru assured her not to.
Given that Merikh and Pagule were out and about rounding up any Miseries they could find, Reynaru could be considered a target. They absolutely would not want to join such a terrible group, nor leave Saros. When Gingko appeared and asked to work together, the two decided together that it was the safest choice while the world was becoming dangerous, this way they could still be inseparable. Saros didn't fear the things to come, in fact excited that she could be of use in her role as a Pandora.
Being around the other Pandoras more as they traveled together, Saros felt like they were all hanging out rather than working. She met the Miseries that formed an alliance with Gingko, all so different and strange, mischevious like Reynaru even, but most of them weren't so bad. But with how Merikh and Pagule were described, Saros couldn't help but feel pity for them. Missing the mundane connections with humans, the two evil Gods were the most inhumane, something that perhaps could have been prevented if they had better experiences in the world. Of course, the most important thing to her now was maintaining her peace with Reynaru, so if the duo needed to be sealed away, she was willing to do so.