You mentioned our characters memories with Regret are lost. Then, have they also absolutely zero recollection of their previous life initially? Whether yes or no, do they they regain their memories over time? Or does it vary case by case, maybe even depends on whether they try to remember or other factors?

When did Regret become involved with Aetherion, when she was still human or afterwards? Does she consider it 'her' kingdom/does she show it preference? How infuential is she as a demigodess? I take it Ydrogg is an unusual exception as a contractor in how much he can defy his patron (and creator)? Is that because Regret was too lenient in their contract, gave him too much power for 'free'? Or did he also manage to rebel because of his innate will?