Perhaps the death goddess is actually a misunderstood entity. In the fanfiction, she could be trying to maintain the balance in the Naruto world which includes death. So, she might be in conflict with Naruto who often defies death in his battles and his will to protect everyone. This could lead to an interesting dynamic where Naruto tries to understand her motives and she tries to make him see the bigger picture.
One idea could be that the death goddess has the power to bring back characters from the dead in the Naruto universe, but at a great cost. Maybe she offers Naruto this chance to revive his parents, but in return, he has to sacrifice some of his own chakra forever.
Another plot could be that the death goddess is secretly related to an ancient clan in the Naruto world. She has been observing the shinobi world for centuries and decides to interfere when she sees that Naruto is the key to either saving or destroying it. She then becomes involved in Naruto's journey, guiding him in some ways and hindering him in others as she has her own agenda for the future of the world.
One idea could be that the Goddess of Death has a special connection with Harry. For example, she might appear to him in a time of great danger and offer him a unique power that no one else has. This power could be related to seeing the true nature of dark magic, which would help him in his fight against Voldemort.
One idea could be that the cat goddess uses her powers to help Naruto master a new form of jutsu. Maybe she can see the potential in Naruto that others overlook and guides him in a spiritual journey to unlock this power. For example, she might lead him to a hidden place in the forest where he can train without distractions.
A possible plot is that an evil force is threatening the world, and only Naruto, with the help of his goddess harem, can stop it. The goddesses each have a piece of the solution. A fire goddess has the ability to create a powerful shield, a earth goddess can manipulate the terrain to their advantage, and Naruto has to bring them all together to defeat the evil.
Well, a plot could be that Kushina is a reincarnated goddess. She doesn't know it at first, but she starts having strange dreams and premonitions. As she discovers her true nature, she has to learn how to use her goddess - like abilities, which include things like super - speed and the power to heal any wound. She then uses these powers to fight against a new and powerful enemy that threatens the ninja world.
One idea could be that Fem Harry, as the Goddess of Death, has the power to see the final moments of every being. She uses this to prevent unjust deaths in the wizarding world. For example, she might foresee a student being wrongly accused and killed by a dark wizard and intervenes just in time. Another plot could involve her dealing with the afterlife. Maybe she discovers that some souls are being trapped and tortured by dark magic in the in - between realm, and she has to fight against the dark forces there to free them.
Well, one interesting idea could be Naruto having goddess - like powers that change the way battles are fought. For example, he might be able to heal on a much larger scale than before, like a goddess of life. Another idea could be his appearance changing to something more ethereal, with a glow or special markings that signify his new status as a 'goddess' in the fanfiction. Maybe his new powers also give him the ability to influence the minds of others in a positive way, like a goddess of peace.
Maybe Ishtar, for some reason, has her powers sealed in the Naruto world. Naruto, being the hero he is, gets involved in helping her regain her powers. Along the way, they have to face off against enemies who also want to use Ishtar's power for their own evil purposes. As they work together, a bond forms between them, changing both of their outlooks on life.
Another plot could involve the cat - fox goddess being a reincarnation of an ancient deity. She has lost her memories but as she interacts with Naruto and the other ninjas, she slowly starts to remember her past and her true purpose. This could lead to a journey where they have to uncover secrets about the origin of the ninja world and her role in it. And along the way, there are battles against those who fear her return and want to stop her from regaining her full power.
Well, perhaps the Yami Goddess has the ability to see into Naruto's future. She warns him about a great danger that is coming, but in order to avoid it, Naruto has to learn a special technique from her. This could lead to a series of adventures where Naruto trains under her guidance while also getting to know her better and a unique relationship developing between them.
One plot idea could be that the Rabbit Goddess appears in the Naruto world during a time of great turmoil. She decides to help Naruto because she senses his pure heart and strong will. She uses her unique powers, like the ability to control nature in a different way than the ninja, to assist Naruto in battles against powerful enemies.