Mizu is the element of water in Japanese philosophy or godai that represents existence that is flowing and formless. It is everything that takes up space and then flees. Mizu adapts to every environment but loses a bit of her older composition in the process of becoming Mizu City.
Mizu has no age as she does seem to have known the world for centuries.
She has currently left Tokyo, her home, her love, her comfort, to seek the world’s cities – for it is from there that she was born and to which she must return.