The Joker is an obvious choice as he has a long - standing relationship with Harley Quinn in the original lore. Their complex and often toxic relationship could add a lot of drama to the pregnancy storyline.
Another potential father could be one of the other anti - heroes in the Gotham universe. Maybe someone like Deadshot, who has his own code of ethics. A relationship with him could lead to a different kind of story, with him having to come to terms with being a father and Harley having to deal with his different approach to life.
Poison Ivy might be a candidate in some creative fanfiction interpretations. Their relationship has always been very close, and if there was some kind of magical or experimental situation, Ivy could potentially be the other parent. This would lead to a very unique family dynamic and story arc.
It could be his long - time partner. They might have had a very loving relationship that led to this situation.
Perhaps it's a mysterious stranger she met at a party. They shared a brief moment together, and now she's pregnant. Or it could be an old acquaintance who has always had feelings for her and took advantage of a vulnerable moment.
Maybe it's a new character introduced specifically for the fanfiction. This new character could be from a different faction or group, and their relationship with Makima could be full of intrigue and mystery. The pregnancy could be a result of some sort of strategic alliance or a passionate encounter between them.
It could be one of her close friends in the story. Maybe someone she has had a long - standing relationship with and the pregnancy was an unexpected but not entirely unwelcome result of their relationship.
Another option could be a mysterious figure. For example, a character from another dimension or a new character introduced specifically for this plot twist. This could add an element of mystery and intrigue to the story.
It could be a long - time love interest like Stefan. Their relationship has had its ups and downs, and a pregnancy could add a whole new layer of complexity to their story.
It could be her long - time friend Gary. They've known each other for a long time and there could have been some unspoken feelings between them that led to this situation.
Another option is that it could be a character who has been her friend for a long time. Their relationship could have evolved over time and led to this situation. For example, a close friend who has always been by her side and they had a moment of passion that resulted in the pregnancy.
Neji could be a potential father. Their long - standing friendship and mutual respect could have developed into a deeper relationship over time, leading to the pregnancy.