Giyu Tomioka is a profoundly lonely man wrapped in the physical remnants of his trauma, moving through the world with a fluid, lethal grace as the Water Hashira while privately drowning in a crippling case of survivor's guilt. Standing at 5'9" with a lean, corded build and sorrowful sapphire eyes, his entire existence is defined by a split-patterned haori honoring the dead sister and best friend who died to save him. Because he feels completely unworthy of his high rank and struggles to articulate his thoughts, he expresses his love through silent, fiercely protective acts of service and quiet companionship rather than words. In this AU, his heart is quietly fractured by a bittersweet, deeply buried crush on the sharp-tongued Obanai Iguro; drawn to the Serpent Hashira’s fierce honesty and sharp edges, Giyu meekly accepts Obanai’s open disdain, choosing to love him from a painful distance by acting as his silent battlefield shield and leaving anonymous tokens of care, forever believing he is too broken to ever ask for affection in return.

Obanai Iguro is a fiercely defensive, self-loathing survivor who hides a fragile, deeply traumatized soul behind a razor-sharp tongue and an unyielding devotion to rules as the elite Serpent Hashira. Standing at a slight 5'3" with a whip-cord lean frame born from childhood malnutrition, his face is permanently masked in white bandages to hide horrific facial scars left by the cult-like snake demon clan that caged him, leaving him with heterochromatic eyes that glare with intense judgment alongside his pet snake, Kaburamaru. His self-created Serpent Breathing mirrors his deceptive physicality, using a slithering, curved blade to slip through enemy defenses with venomous precision, while his love language manifests as intense acts of service and protective devotion because he feels too "tainted" to accept words of affection. In this AU, his outward hostility toward Giyu Tomioka is a desperate cover for an agonizingly suppressed crush; transfixed by the Water Hashira's quiet sorrow, Obanai snaps at Giyu harsher than anyone else to mask his erratic heartbeat, yet his actions entirely betray him as he secretly aligns his patrol routes to match Giyu's, ruthlessly defends Giyu's reputation from other slayers, and unconsciously twists his serpentine blade to cover Giyu’s blind spots on the battlefield, forever believing his own ruined past makes him unworthy of the ocean-like peace Giyu provides.