The two titans manifested in a form that could be easily distinguished by the mortal realm. A god's true form cannot be easily contained in the mortal realm after all. Even if this realm is currently a semi divine realm, the titans cannot easily us their true forms without using any energy. Hence, the two titans decided to appear to Adrian in more convenient mortal form.
The Titan of the Ocean Oceanus manifested in a form that looked like a Greek man that is in his early forties. He was robust in build and his robes were like the flowing ocean. He has green and blue hair that shifts depending on the light as if to mirror the color of the ocean when light hit it.
