So it's like "what if I was dying and the only way to save my life was for me to possess you/what if you were dying and the only way to save your life was for me to possess you - what if that possession saved us both, what if we learned how to live a shared life, what if we became something greater together, what if we were separated and we both went into hiding/exile because we couldn't find a foothold in the world without each other, what if the world forgot both our names" It's the most beautiful quasi-plural yuri between a human girl (Linda Danvers) who was being sacrificed and a shapeshifter (Matrix/Mae Kent) who merged with her to save both their lives. And together they were Supergirl, Earth Angel of Fire. And I like to think they found each other again eventually in some place untouched by DC continuity shifts.