One idea could be that Laurent tries to redeem himself in Irina's eyes. Maybe he saves her from a dangerous situation, like a group of rogue vampires. This would start to change her view of him from being just a somewhat untrustworthy vampire to someone she could potentially care about.
They could be developed by giving them new powers or abilities. Suppose Laurent discovers he has the ability to manipulate the weather in a small way. This new power could change his self - perception and how others, including Irina, see him. Irina could develop the ability to communicate with animals. This would not only make her more interesting but also create new storylines where she uses this ability to help Laurent or in their adventures together.
One idea could be that they have to overcome the differences between their two worlds. Bella being from her normal human world and Laurent from his vampire one. They might struggle with how their relationship is seen by others, like the Cullens.
One interesting plot idea could be exploring how different characters adapt to the post - apocalyptic world in new and unexpected ways. For example, a character who was once a timid office worker becomes a fearless scavenger.
One idea could be a story where Issei and Irina have to team up to face a new, powerful enemy that threatens their world. They start off as friends but gradually realize their deeper feelings for each other during the course of the adventure.
A plot could involve a new vampire in the Twilight universe who is ashamed of their transformation and uses a mask to try and fit into human society again. They struggle with their new instincts while trying to keep their identity a secret. Along the way, they meet other characters from the Twilight series and their story unfolds in a way that challenges the norms of the original story.
One idea could be a new vampire character being reborn in the Twilight universe with a special power, like the ability to control the weather. This would create a whole new dynamic as they interact with the Cullens and other vampires.
One idea could be exploring a new magical creature in the Twilight universe. For example, a magical being that can control time and how it affects the relationships between vampires, werewolves and humans. Another plot could involve a character from the Twilight world getting lost in a different magical realm and having to find their way back, all while facing new and strange challenges.
One plot idea could be a hockey player who discovers he has a special power during a twilight game, like being able to skate at super - speed. Another could be a love story between a hockey fan and a player, set against the backdrop of twilight - filled evenings at the rink. Maybe a story about a hockey team's struggle during the twilight of their careers, with an old - timer coming out of retirement to save the day.
One idea could be exploring the origin of the psychic powers in the twilight world. Maybe there was an ancient event that triggered it.
A fanfiction could explore the idea of a character from Twilight becoming a Shadowhunter. For example, Bella could discover she has Shadowhunter blood and has to leave the vampire - werewolf drama behind to learn a whole new set of skills and rules in the Shadowhunter world. It would be interesting to see how she adapts and how her relationships with Edward and Jacob change as a result.