Hands Stained Red

On that fateful night of the Nogitsune's demise, Kayla made the decision to save Stiles' life. To save him from the nogitsune's dark magic. After all, it was him or her and she would always - always - choose him. But although her sacrifice was just that, a sacrifice, that didn't stop Kira's guilt from seizing hold and darkening her soul. Side fic / Kira's guilt