Rikki might get hurt during a storm at sea. The strong winds and waves could throw her against the rocks or debris in the water. For example, a large piece of driftwood could hit her and cause an injury.
Rikki was swimming near Mako Island when suddenly a strong current caught her. She struggled against it, but as she was pushed into some sharp rocks, she got hurt. Her friends, Cleo and Emma, quickly swam to her. They helped her back to shore. Rikki's leg was bleeding and she was in pain. They used their powers to heal her a little bit, but they knew they had to get her to a doctor. So they called an ambulance and waited nervously for it to arrive.
You could start with them having a conversation about their future and wanting a family. Then, Rikki reveals that she might be pregnant. This way, you build up the anticipation before the big news and show their relationship dynamics leading up to this point.
One idea could be that they discover the pregnancy unexpectedly. Maybe they're still in the midst of dealing with their powers and the challenges that come with them. Rikki could be worried about how her mermaid nature might affect the pregnancy. Zane, on the other hand, would be determined to support her no matter what. They might have to hide the pregnancy from some of their friends at first because they're not sure how to explain it, especially considering their unique situation as mermaids and mermen.
One common theme is friendship. Fans often explore how Will and Bella's friendship develops over time, especially considering Bella's mermaid secret. It's about their loyalty and how they support each other.
One common theme is the clash of different worlds. Since Percy comes from a world of demigods and H2O is about mermaids and a more aquatic - focused world, there's often a lot of adjustment and misunderstandings as the characters from both universes interact.
Love and relationships are also popular themes. The h2o characters might fall in love with characters from the other crossover story. This could create interesting relationship dynamics and storylines, like a mermaid falling for a human from a different fictional world.
Once upon a time in the underwater world where the mermaids from H2O and Mako Mermaids co - existed. A group of mermaids from both series decided to have a friendly competition. The H2O mermaids showed off their unique ability to turn water into different shapes, while the Mako Mermaids demonstrated their incredible speed in the water. As they interacted, they learned new things from each other and became great friends, vowing to protect the ocean together against any threats.
In this fanfiction, the mermaids from H2O could be discovered by the Avengers. Maybe the Avengers are on a mission near the beach where the mermaids live. The mermaids' unique abilities, like controlling water, could be mistaken for a new threat at first. But then they realize they can work together. The mermaids could use their water powers to help the Avengers during a big battle against a water - based villain like Namor. They form an unlikely alliance and learn from each other's worlds.