Kimetsu no Yaiba: Reborn by Lightning

Ruby always felt like she didn't belong anywhere.

She never expected that to become true.

After a violent accident tears her from her old life, Ruby awakens in a world she recognises... but only as a story. Here, demons roam freely, death is constant, and surviving means enduring horrors no one should have to face.

Under the care of Sakonji Urokodaki and alongside Tanjiro Kamado, Ruby trains to survive. But survival comes at a cost. With every wound, every loss, she becomes someone new.

She leaves her old name behind.

This is the story of Raiko Urokodaki.

As Raiko walks deeper into this world, she is confronted with brutality, trauma, and choices that leave permanent scars. She learns that saving others doesn't always mean winning-and that sometimes, it means living with unbearable guilt.

Yet even so, she refuses to stop trying.

A dark, canon-divergent isekai focused on identity, found family, moral conflict, and the slow, painful transformation of a girl who wanted to matter.

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- Third person POV
- OC-led story (Ruby to Raiko early on)
- Characters aged up
- Canon-divergent w/ original elements

Additional Notes:
This story may eventually include romantic development and occasional mature scenes. While intimacy is not the main focus, it may appear naturally as relationships grow. Nothing is fully planned. The story will decide where those connections lead. (As in "slow-burn" relationships, and NSFW scenes).

Content Warnings:
This story contains graphic violence, trauma, psychological distress, and other dark themes. Reader discretion is advised.