Well, there are several challenges. Firstly, there's the matter of their origin stories. Supergirl comes from a place of hope and family values, while Doomsday was created for destruction. This fundamental difference in their beginnings could cause a rift. Secondly, their allies and enemies would play a role. Supergirl's friends would likely be against the relationship, thinking Doomsday is a bad influence. And Doomsday's 'creators' or those who control him might try to use the relationship to their advantage, which would put a strain on their love.
One major challenge would be public perception. Supergirl is seen as a hero, and Doomsday is known as a destroyer. People would be very much against their relationship. Another challenge could be Doomsday's nature. He has a tendency towards destruction, and Supergirl is all about saving lives. It would be hard for her to be with someone whose instincts are so different from hers.
The first challenge is trust. Given Doomsday's history of causing chaos, Supergirl would have a hard time fully trusting him. And Doomsday, who may not be used to positive emotions like love, might struggle to trust Supergirl's intentions. Also, their powers are so different in nature. Supergirl's powers are more about protecting and helping, while Doomsday's are destructive. This contrast in power usage could create a lot of friction in their relationship.
One major challenge would be their different natures. Darkside is often associated with darkness and evil, while Supergirl stands for truth, justice, and the American way. Their moral compasses seem to be pointing in opposite directions. People around them, like Supergirl's friends and allies in the Justice League, would likely be very against their relationship, which could put a strain on it.
One challenge they might face is public perception. Supergirl is seen as a symbol of hope and strength, while Beast Boy is often seen as more of a prankster. People might not understand why they are together. Another challenge could be their different power levels. Supergirl is extremely powerful, and Beast Boy might sometimes feel inferior. But he could also use his intelligence and unique powers to complement her brute strength.
One way their relationship could work is through mutual understanding of their powers. Doomsday is a powerful being, and Supergirl, with her own set of abilities, could find a connection in that. They might start by realizing that they are both somewhat outcasts in different ways. Doomsday is a creation that is feared, and Supergirl is an alien on Earth. Their relationship could be based on this shared sense of otherness and a desire to protect each other from a world that may not fully accept them.
She might face the challenge of intangibility. Ghosts can be intangible, making it hard for Supergirl to land a physical blow.
In some fanfiction concepts, they could face the challenge of different responsibilities. Poseidon had to manage the entire sea realm, deal with storms, and protect sailors. Amphitrite, on the other hand, might have been more focused on the well - being of the sea creatures. Their busy schedules could have made it difficult for them to spend quality time together. Additionally, there could be family - related issues. Poseidon's family, like Zeus, might have had certain expectations or demands that put strain on their relationship.
One major challenge would be Artemis's vow of chastity. Since she has sworn to be a maiden goddess, falling in love goes against her very essence. In the fanfiction, this could create a huge internal conflict for her, as well as external pressure from the other gods who uphold her vow.
One major challenge would be the age difference. Tsunade is much older than Naruto, and this could lead to social and cultural disapproval in the Hidden Leaf Village. Another challenge would be their different positions in the village. Tsunade is the Hokage, and Naruto is a young ninja. There could be power dynamics at play that make a relationship difficult. Also, Tsunade has a lot of emotional baggage from her past, like the loss of her loved ones, which might make it hard for her to fully open up to Naruto and embrace a new relationship.
One challenge could be their different loyalties. Ivypool is loyal to her clan, while Hawkfrost has shown time and again that he is more self - serving. This would create constant conflict as they try to be together. Another challenge is the distrust from Ivypool's clanmates. If they knew she was involved with Hawkfrost, they would be suspicious of her motives.
In the fanfiction, Hiccup and Astrid's secret love has several challenges. For starters, their duties to the village often pull them in different directions. Also, there are those in the village who have different ideas about who they should be with. Their families' expectations could also pose a problem. And, of course, there's always the risk of a dragon - related emergency interrupting their private moments together.
One challenge could be their different personalities. Kiba is bold and outspoken while Hinata is shy and reserved. This can lead to misunderstandings. For example, Kiba might think Hinata is not interested when she's just too shy to show her feelings.