One common theme is friendship. Rei and Usagi have a strong friendship in the original series, and fanfictions often expand on that. They might go through challenges together and come out stronger.
A theme that frequently appears is the power of their connection. Their combined powers or just their emotional connection can be a big part of the story. Also, there's the theme of acceptance. They accept each other's flaws and grow together. In some fanfictions, they face challenges that test their relationship, but in the end, acceptance prevails.
Sure. One great rei x usagi fanfiction is 'The Bond of Fire and Moon' on FanFiction.net. It beautifully explores their relationship with well - written dialogues and interesting plot twists.
There's 'The Unspoken Connection' which delves deep into the unspoken bond between Usagi and Rei. It has some really well - written scenes that show their understanding of each other on a deeper level. Also, 'Usagi and Rei's Adventure' is full of exciting moments and great character development for both of them.
Usagi's friends would be extremely worried. They would immediately start looking for her. They might split up to cover more ground and search different areas where Demando could be hiding her. They would also use their powers to try to sense Usagi's location. For example, if one of them has a power related to sensing emotions, they could try to detect Usagi's fear or distress.
Love and sacrifice is a common theme. Mamoru would sacrifice his time and energy to take care of Usagi. Another theme could be the power of friendship. Their friends would likely come to their aid during this difficult time. Also, the theme of hope. Despite Usagi being sick, there is always hope for her to recover and have a healthy baby.
The plot could involve Usagi's sickness being related to some sort of magic or enemy plot. Since she's pregnant, her powers might be affected. Mamoru, being the loving partner, searches for a cure while also protecting Usagi. There could be a lot of emotional turmoil as Usagi is worried about the baby and Mamoru is torn between finding a solution and being by her side all the time. Eventually, with the help of their friends, they figure out what's wrong and Usagi recovers, ready to give birth to a healthy baby.
Tuxedo Mask could also be in the harem. He has a long - standing relationship with Usagi, and in a harem scenario, his feelings for her could be even more intense, competing with others for her love.
Another reason could be an accident. In some fanfictions, the setting might be more of a daily - life scenario with a twist. Perhaps Usagi is distracted while walking and trips over something, resulting in an injury. This can add a touch of realism to the otherwise fantastical world she lives in.