Maybe in this fanfiction, Diego and Shira are the only ones turned human in a tribe of prehistoric humans. They are initially feared but then prove their worth by using their animal - like skills to protect the tribe from other dangerous animals. They could also have a romantic relationship that develops in a unique way, different from how it would be as animals.
Another plot could involve Diego and Shira being human but having to go on a quest to find a way to turn back into their original forms. Along the way, they meet various characters from the Ice Age movies who are also affected in strange ways. They face challenges like dealing with human emotions more deeply than they did as animals and learning about human culture, all while trying to reverse the transformation.
One idea could be that Diego and Shira are transformed into humans by some magical force in the Ice Age world. They then have to learn how to live as humans while still retaining some of their animal instincts. For example, they might be really good at hunting in the wild as humans because of their past as saber - toothed tigers.
A fanfiction idea could involve Diego and Shira's relationship. They might have an argument over how to protect their group. Shira could think Diego is being too overprotective, while Diego believes Shira is taking too many risks. But in the end, they realize they both have the same goal and make up, strengthening their bond.
In a fanfiction, Diego and Shira could be on a mission to save a group of baby animals that got separated from their families during a big ice storm. Along their journey, they share their past experiences with each other. Diego tells Shira about his time with Manny and the others, and Shira opens up about her own struggles. This sharing brings them closer together.
One possible plot could be that Diego and Shira go on a journey to find a new place for their pack to settle. Along the way, they face various challenges like crossing a dangerous river and avoiding a group of hunters. They have to rely on each other's skills, with Diego's strength and Shira's agility. Their relationship deepens as they overcome these obstacles, and they end up leading their pack to a beautiful and safe new territory.
In a fanfiction, their love might start with a misunderstanding. Diego mistakes Shira for an enemy at first sight. But as he gets closer to her, he realizes she's just a misunderstood creature. Shira, in turn, is initially wary of Diego. However, as they are both caught in a dangerous situation, like being trapped in a cave during an earthquake. They have to rely on each other to survive. This experience makes them see each other in a new light and their love begins to blossom.
Maybe the fanfiction could focus on how their relationship changes during the pregnancy. Diego becomes more tender and loving, and Shira becomes more dependent on him in some ways. They could also have some arguments about how to raise the cub. For instance, Diego might want to teach the cub to be a fierce hunter from the start, while Shira thinks it should first learn to be gentle and kind. These differences in opinion add some spice to the story while they are waiting for the new life to arrive.
As humans, Diego and Shira could have a more nuanced relationship. They might experience jealousy in a new way. Say, if another human showed interest in Shira, Diego would have to deal with his feelings in a different manner than he did as an animal. Also, they could express their love more openly, like through hugs and kisses, which are more typical human ways of showing affection.
Diego and Shira would probably raise their cubs to be strong and independent. Diego, with his experience as a saber - tooth tiger, would teach them hunting skills. Shira, being a tough female, would instill in them a sense of self - reliance.
A fanfic could focus on the relationship between Diego and Shira. Maybe Diego wants to show Shira a special place he found in the Ice Age wilderness. It could be a beautiful hidden valley with warm springs. Along the way, they talk about their pasts, how they became the tough sabers they are now. And at the end of the journey, their bond grows even stronger.
One possible scenario in a Diego and Shira love fanfiction could be that they start off as rivals in the ice age world. Diego, being the more serious and protective type, initially sees Shira as a threat. But as they face various challenges together, like fending off other predators or surviving a harsh winter, they gradually develop feelings for each other. They might share secret glances and small acts of kindness that slowly build into a deep love.
One possible fanfiction plot could be that Diego is overly protective of Shira during her pregnancy. He scares away any potential threats and constantly hunts for the best food for her. Shira, on the other hand, is getting impatient with his over - protectiveness but also secretly loves it. And they both start preparing a den for their upcoming family member.