Another possibility is that it could be a result of some kind of magical or unexpected event, and there isn't a traditional 'father' figure. Instead, the baby is a product of Sakura's own power or some strange occurrence in the fanfiction world.
It could be Sasuke. Given their relationship in the original series, it's quite possible that he is the father in the fanfiction.
Maybe it's a new character that the author of the fanfiction created. This new character could have a unique backstory and connection to Sakura, which led to the baby.
The father might be a character who is in a position of power and Sakura is afraid of the consequences if his identity is revealed. For example, he could be a nobleman or a powerful wizard in a magical world. Since having a relationship with him might be frowned upon or dangerous, she keeps the baby a secret.
The father could be John Smith. Their relationship in the original story was complex and having a baby together would add a new dimension to their story. It would also explore how they navigate parenthood given their different backgrounds.
Maybe it's a mysterious character. The fanfiction could introduce a new character as the father, someone with a hidden past or special abilities that add an element of intrigue to the story.
It could be a character she has had a long - standing relationship with in the original story. Maybe someone who has been by her side through many adventures and they shared a deep emotional connection which led to the baby.
Perhaps the father is another well - known fairy in Pixie Hollow, like Terence. They could have had a secret relationship that led to the baby. Terence has always been close to Tinkerbell, and their shared experiences with pixie dust and helping Peter Pan could have deepened their connection to the point where they had a baby.
Perhaps it's a new character, a foreign traveler who came to Mulan's village. He was charmed by Mulan's strength and beauty, and they fell in love. He is the father of the baby in the fanfiction.
It could be Naruto. Given their relationship in the original series, it's very likely that he could be the father in the fanfiction.
Jace could be the father. Since they have a strong connection in the original story, it would make sense for him to be the father in the fanfiction.
Another option is that the father is a character from a different species or planet that Ahsoka met during her travels. Their encounter was brief but passionate, resulting in the baby.
Another option could be an alien from Starfire's home planet. This would add an interesting dynamic as the baby would have a strong connection to Starfire's alien heritage. It could also bring in some unique storylines about the alien culture and how it affects the baby's upbringing. Maybe the alien father has certain powers or responsibilities that are passed down to the baby.