she’s got a super normal middle class upbringing.
once out of high school she moved into Tokyo after spending a year at home. She spent the next year working mostly night jobs and building relationships with some of the seedier citizens of Tokyo. She realized she could use her persuasive skills to make herself into a pretty effective information broker, and began building an information web by befriending small time gangsters, and some members of law enforcement.
After a while of selling intelligence, the orochi group caught wind of her, and recruited her to sniff out leaks and protect the company’s intellectual property. She was given a high degree of freedom and considered an independent contractor.
she moved up the ranks of the orochi group for the next seven years, while also using their connections to expand her information web. She was occasionally assigned to go on small missions, but never anything too dangerous or overt. She became a private investigator for the company, and occasionally took jobs for outside sources.
The orochi group has her track down a stolen prototype. It is a weapon forged from a sacrificial knife of a dead god, which could theoretically become a powerful artifact if put in the right hands. Jayce tracks down the people who stole it, but eventually hits a wall when her plans start consistently failing. She realizes someone has been keeping tabs on her, and tries to run.
She is led into a trap, realizing the people she was tracking were never after the weapon, but after her connection to orochi. The dragon offers her a deal to become a double agent for them, which she pretends to accept.
She immediately tells Orochi what happened, hoping they could get her out of her deal, but realizing the kind of liability she was, they stab her with the weapon she intended to return, and leaves her for dead in an alleyway.
Knowing this would happen, the dragon steps in, saves her ass, and offers her a much shittier deal. Jayce, heavily bleeding and with no allies left, has no choice but to accept and becomes a fully fledged member of the dragon.
She ends up running dangerous and tedious jobs for the dragon as punishment, which she constantly bitches about. She also frequently runs jobs involving the orochi group and information gathering.
she is hoping that she can still get out of her deal and go back to working for the orochi. This is hugely unlikely, but she figures if she finds a way to cripple the dragon from the inside, they’d have to take her back.
they know this, of course, and assigned someone to keep her in check until they can wear her down enough to stop resisting.
the artifact she was tracking down is now technically hers. The dragon never had any interest in it, and gave it to her as kind of a petty jab at her. But, when she got injured with it, it woke up the dead god that it was bound to, who now desperately wants blood.
the dead god felt cheated out of a sacrifice after Jayce survived, but after a while he realized the kind of advantage he would have if he could manipulate her, and intends to restart his cult to gain power again, with her as his high priestess.
Jayce, having none of this bullshit, refuses to fight when it can be avoided, and has never killed anything living with it.
The old god is also furious at her being such a little bitch and is trying to make her go insane, so she would be easier to sway.