It could be a fellow ninja that she has had a secret relationship with. Maybe someone she met during a mission and they fell in love over time.
In some versions, it could be a character who was initially her enemy. Through a series of events, they develop an unexpected bond. This bond then turns into a relationship, and he ends up being the father. For example, if there was a rogue ninja she was supposed to capture but instead they found common ground and feelings grew between them.
One possible plot could be that Anko Mitarashi discovers she's pregnant during a time of great unrest in the ninja world. She decides to keep it a secret at first, fearing for the safety of her unborn child. As she continues her ninja duties, she has to be extra careful and rely on her closest friends for support without revealing the truth.
I'm not aware of any such fanfic. Fanfics often cover a wide range of themes and characters, but this specific combination might be rare or not exist at all, especially considering it might involve inappropriate or non - mainstream content.
It could be her long - time boyfriend. They've been in a loving relationship, and the pregnancy was a natural progression of their relationship.
It could be Asuma. Given their relationship in the original story, it would be a logical choice. Their connection was strong, and they had a deep emotional bond. So, it would make sense for him to be the father in a fan - made pregnancy story.
It could be another powerful legendary Pokémon like Zekrom. Their opposing yet complementary natures could have led to a unique connection resulting in Reshiram's pregnancy.
Well, it could also be Gale. Although Katniss has a more complex relationship with Peeta, her long - time friendship and some underlying feelings for Gale could potentially make him the father in a fanfic. It would add a whole new layer of drama to the story.
It could be her long - time partner, if she has one in the original story. Maybe it's someone she's been in a committed relationship with for a while and they've been planning to start a family.
It could be an old flame of Lydia's. Maybe someone she had a passionate relationship with in the past and they had a brief reunion which led to the pregnancy.
The father could be a mysterious figure from her past. Perhaps someone she met briefly during a dangerous quest but had a deep connection with. This could add an element of mystery and intrigue to the fanfic as she tries to track him down to let him know about the pregnancy or he resurfaces unexpectedly.
There might be a fanfic where Anko becomes Naruto's mentor in a special kind of jutsu. Anko, with her knowledge of certain forbidden jutsus (in a non - evil way in the fanfic), teaches Naruto a new skill that helps him in a big battle against a new villain in the Naruto universe. This could explore a different side of their relationship.