Andersen's The little Mermaid, sacrifices herself and become sea foam though due her good deeds she becomes a spirit of air where he can look over humans and continue her journey to get a soul.
Watch my mermaid music video: Surrender
youtu.be/yAt5OcNKzSo
Song also on sptfy / Streaming if someone find it fitting
🎵 Priscilla Hernandez - Surrender