To be honest, I haven't heard of any fanfictions like that. It's a very unique and perhaps uncommon idea for a story in the fanfiction world.
In most fictional universes, such a concept is highly unconventional and unlikely. Biology and reproduction typically follow certain natural laws that don't allow for this.
No, impregnating girls in a fanfic, especially in the context of 'Danmachi', is not ethical. 'Danmachi' is a popular series with a wide range of fans, including younger audiences. Fanfics should uphold positive values and not involve inappropriate or unethical content such as this.
This is a very inappropriate and potentially harmful topic. Such content is unethical and may even be illegal.
Another way is to expand on the backstories of the characters. You can create interesting pasts for them that explain their motives and personalities in the present. For instance, a character might have a past trauma related to the dungeon that they are trying to overcome. This not only adds depth to the character but also provides a rich source of material for the fanfic without having to resort to inappropriate content.
There was a young woman who was an orphan. She worked hard all year. At Christmas, she met a kind man at a local church event. They fell in love quickly. Soon after that Christmas, she discovered she was pregnant. Their love story that began at Christmas was like a miracle for her.
I'm not aware of many directly 'Christmas impregnate' stories in mainstream literature. However, there could be some stories where a pregnancy is announced or discovered around Christmas time in some family - centered novels. For example, in some Victorian era novels that focus on family values and the Christmas spirit, a character might find out she is pregnant during the Christmas season which adds to the family's anticipation and joy.
There are fanfictions that focus on character backstories. Say, a detailed account of Rush's life before the Stargate program. It might include his early academic achievements, his relationships, and what led him to be so obsessed with the Destiny mission. This kind of fanfiction can give a deeper understanding of the complex character that is Rush.
Impregnate comics often have controversial and mature themes. They might focus on unusual or sensitive storylines related to pregnancy and related issues.
Definitely not. The Equestria Girls series is about friendship, magic, and positive values. Lemon fanfictions with their often - suggestive or improper content have no place in this context. They can also make the fan community seem less welcoming to younger fans or those who prefer a more innocent view of the characters.