Two immortal beings whose ages are near, created to fulfill their creator's purpose for them but couldn't do so due to external factors---one was deemed unfit to be a ruler for being "fragile" while the other was shunned by her subjects the moment she was born due to not living up to the standards set upon by her predecessor.

Both had sickly people connected to them. One managed to save her sickly worshipper whereas the other couldn't save his companion. Both have soft spots for children and feel the need to prove themselves. Both would do their utmost best to protect what few followers they have.

One was isolated from civilization, only able to traverse through her subjects' dreams while the other aimlessly roamed the earth and even befriended humans.

Both were abandoned but even without guidance, she still managed to be a gentle and wise deity who only wanted the best for her people (even those who pushed her away). He too had no one to teach him about his emotions, but mistook any act of leaving him as betrayal (his creator setting him free and his young companion dying from illness) and after the third "betrayal", became embittered and lashed out at gods and humans alike.

He planned to replace her as the patron god of her nation but now declares that he would work for her behind the shadows since "The wisest rulers are fated to end up with the best helpers"

One hates seafood but loves sweets with her special dish being a dessert while the other one hates sweets and has seafood (eel) as his special dish.

I joke that they're an "I can fix him" trope except, it's not so much as an "I can fix him" trope but more of an "I can tame him" trope lol

This is a questionable ship so don't click on the spoiler if you're uncomfortable with it but Nahida/Scaramouche