She is half goddess and half human...
her mom cheated on her god partner with human so Casey doesn't like her mom much, but is as well thankful she is here thanks to her.

she works as model in human (fantasy) world, but she had a thought that her photos in magazines and on socials are starting to be too boring or uninteresting, so she mades up her mind and is about to travel with other (new) photographers friends (Zara is one of em).

She is slightly obsessed with her looks and its sometimes little worrisome (I myself don't know for sure... you can give me some ideas in comments...)(and as well her obsession is one of the reasons why she wears EVERYWHERE some flowy elegant dress), but other than that she is very kind but hides it with her confidence and attitude (tsundere).

((and she wars frames to preference being in a model or in a "frame" as a model in accessories and her halo))