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.
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.
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 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.
They could be on a quest to find a special herb that has healing powers. This herb is said to be in a very dangerous area filled with deep crevasses and fierce predators. Diego and Shira would have to use their skills and rely on each other to get to the herb.
One possible fanfiction idea could be that Shira's pregnancy brings out a more protective side in Diego. He starts to gather extra food and find a safer place for them to stay. The other characters, like Sid, might initially be a bit clumsy in helping but mean well.
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.
They might have a friendly competition. For example, they could see who can hunt the biggest prey in a day. This would not only show their skills but also add some fun and flirting to their relationship. It could also lead to them respecting each other more.
In the Ice Age series, Diego and Shira make a great couple. A fanfic about their love could explore their initial attraction. Maybe it started during a dangerous hunt when they had to rely on each other. Diego's bravery and Shira's cunning would be a great combination. Their love story could also involve how they overcame differences in their pack mentalities. Diego was from one group and Shira from another. But love has a way of bridging such gaps.