Rose's first golem, Aqua served as her Proof of Magical Ability to get her official witching license. That was three-hundred years ago.
Now Aqua is often forgotten for decades at a time. Sitting in a glass vial in Rose's shop. Saying she's pissed would be an understatement.
When she's remembered and let out, Aqua mostly spends her time reacquainting herself with how the world works and what is and isn't acceptable anymore.

I made Aqua a little more flow-ey in terms of design because 1. Water, and 2. She doesn't really get out enough to remember what people look like.
The opaque glass stopper on her left hand is the focus of her body, meaning if it's destroyed, she will be too, hence the reason Rose doesn't like her being out of her bottle too long.