I don't know. It's possible that Sainte Marie Island is purely fictional and not associated with any existing country. Maybe it was created to serve a specific purpose within the fictional narrative without being tied to a real geographical location.
Another option is to check out some fan - run forums dedicated to Elena of Avalor. Some fans might post their own creative works there, including fanfiction about this particular romantic moment between Elena and Mateo. You may need to register on these forums to access all the content, but it can be worth it if you're really into this kind of fan - created story.
She could be terrified at first. After all, Klaus is a very powerful and dangerous vampire. But Elena is also a strong - willed character. So she might quickly gather her courage and start looking for ways to escape.
In 'Death in Focus: An Elena Standish Novel', Elena Standish is most likely the protagonist. She might be a complex character with her own backstory, desires, and fears. Maybe she has a profession that ties her to the events involving death, or she could be an accidental hero who gets drawn into the world of death - related mysteries. We can expect her character to develop as the story progresses, facing challenges and making decisions in the context of the death - centered plot.
The Salvatore brothers, Stefan and Damon, are the most likely candidates. They both have a strong connection to Elena and would stop at nothing to rescue her. Stefan's sense of chivalry and Damon's fierce protectiveness would drive them to track down Katherine and get Elena back.
Elena would likely be angry. She has her own agency and doesn't like being controlled. If Stefan kidnapped her, she would fight back. She might use her knowledge of the supernatural world and her relationships with other characters to try to escape. For example, she could try to call out to Damon telepathically if they have some sort of connection in the story.
Elena in the 'elena 5th grade reading story' could be a multi - faceted character. She might be a dreamer, imagining all kinds of things as she reads different books. She could be an adventurous spirit, not afraid to try new reading materials or take on challenges in the story. And perhaps she is also a bit of a leader among her peers, sharing her love for reading and inspiring others to read more.