Hill had a feeling that Olypher knew where the Ring of Winter she had made was located, but she simply didn't want to look for it.
Once found, with her divinity largely eroded away and struggling to maintain even a faint trace of Divine Power, she couldn't keep it safe, and it would be tantamount to gifting it to Talos, so it was better to hold onto it and wait for an opportunity.
That's how miserable it is to follow the wrong leader, but in the Evil Faction, unless you have the strength yourself, being oppressed is quite common.
She also followed Talos because without him, her situation would be even worse!
What irritated Olypher the most was that, despite her special relationship with Talos, he never ceased his efforts to harm her.
Compared to Ambori and that indistinguishable-from-a-beast Marla, the only slight advantage Olypher had was at least she wouldn't be killed by her own Main God.
