Thor is often a popular character in 'Avengers Goddess Fanfic'. His godly status and connection to Asgard make him a natural fit when goddesses are involved. He might have a romantic or a platonic relationship with the goddess characters. Another popular one is Loki, his mischievous nature can add a lot of twists and turns to the stories.
In some 'Avengers Goddess Fanfic', the goddess could be a creation of an ancient power source. She is initially a mystery to the Avengers. As the story unfolds, they learn that she holds the key to saving the world from a dark force that is slowly consuming all life. Her powers are tied to nature, and she can communicate with animals to gather intelligence for the Avengers.
The goddess could be a new character created specifically for the fanfiction. Maybe she's a being from an ancient magical civilization that has been dormant for ages.
It could be a completely original goddess created just for this fanfiction. Maybe she is the goddess of a forgotten element, like the goddess of lightening that has been long forgotten in the ninja world, but still holds great power.
It could be Aphrodite. Given her domain of love, it would be an interesting take. Percy might be charmed by her beauty and grace, and they could end up having a child. The child might inherit Aphrodite's charm and Percy's courage.
The goddess could also be an original creation for the fanfiction. A being with a unique set of powers like the ability to control time and space. This goddess could be betrothed to Harry to stop an impending doom that threatens both the wizarding and Muggle worlds. Her powers would be so great that she needs Harry's connection to the wizarding world to fully utilize them and save the day.
It could be Athena. Athena is known for her wisdom in Greek mythology. She could pass on her wisdom to Harry, making him not just a powerful wizard but also a very wise one. He could use this wisdom to solve problems in the wizarding world in a more strategic way.
The goddess could be an ancient Celtic deity. In the fanfiction, the author might choose a Celtic goddess because of the rich magical lore associated with them. For example, Morgan le Fay from Arthurian legend could be reimagined as a goddess in this context, and she could adopt Harry due to her interest in powerful magic users.
There's no way to know exactly who the wolf goddess is without reading the 'naruto and the wolf goddess naruto fanfiction'. However, she could be a character that symbolizes the wild and untamed aspects of the Naruto world. She might have a connection to the spiritual side of the world, like the tailed beasts. And perhaps she has a unique role to play in Naruto's story, whether it's as a guide, a protector, or even a potential threat depending on how the story unfolds.
She could be an ancient Forerunner who has been in stasis for millennia. The Forerunners were extremely advanced, so it would make sense for one of them to seem like a goddess with their technology and knowledge.