It all started when she wrote them a letter many months ago in her university library. They talk through social media, but have never met. When they finally meet during a convention, everything will change. Are they soulmates?

***a Rin x OC story*** [[sexual content in later chapters just warning you]] Ares "Air" Yagami is the daughter of Lucifer. I know what you're thinking, cool Rin has a sister now right? Wrong. 16 years ago its been discovered by a compact group of exorcists that Lucifer and Satan are two completely different demons after one of their members was overtaken by Lucifer and burst into white flames. Word got around and now everyone knows of Lucifer's existence. Air, born a year after that, now 15 years old has come across Rin Okumura and they are both determined to face and defeat their own fathers for their own reasons. We follow Air through her journey as she meets new people and finds out more about her past and her mother, all the while she is confused about a possible love interest developing from her and Rin's strange and deluded friendship. At a point she must choose; sacrifice her life for the sake of killing Lucifer and having one last happy memory, ... or keep on living life where she can stay with her friends and loved ones but to continue to remain ignorant of the answers to her most important questions.

❝ A smile formed on my face, and for a moment, it seemed like the city went quiet as if they'd really heard me. And maybe, just for a second, they did. ❞ ••• Nobody had seen your father, Mephisto, after your mother died, and nor did your aunt care. It was only a matter of time before you would find Yukio and Rin once again in an academy far from home, where multiple conflicts would occur. When demons show up at the doorstep of your life, memories are lost, and Satan is a relative of your two best friends, what more could happen when a certain word becomes your greatest power to save everyone in True Cross and beyond the bridge? Feelings can change, but your love for the people in your hands will always be true. What could go wrong? ❗️: WE REACHED 100K UWU - This is so cringe read at your own risk ✔️ EDITED. COMPLETED. - HIGHEST RANK: #3 IN 'EXORCISTS' - HIGHEST RANK: #1 IN 'RIN X READER' - HIGHEST RANK: #1 IN 'YUKIO X READER' - HIGHEST RANK: #602 IN 'ANIME' - HIGHEST RANK: #8 IN 'EXORCISTS' - HIGHEST RANK: #10 IN 'BLUE EXORCIST' - 2 parts in 1 story.