DISCLAIMER- I do not own Blue Exorcist
Warnings- CHARACTER DEATH. This story touches on the fact that demons live for a very long time. Manga spoilers but not too much.
Authors Note- I've been in a depression wave for the past couple days so I did this to cry and get it out of my system.
The form on the bed was too still. An oxygen mask over his mouth. The snow outside was falling in graceful swirls. They seemed to dance with each other, maybe in love or in a playful tussle. Rin opened the window, stretching his arm to feel the snow on his skin. The cold turned his hand pink. Rin sighed, his breath billowing out. He inhaled deeply, the cold air stinging his throat. His white tail swaying slowly behind him. He could see his reflection in the window. Youthful face, stunning blue eyes, hair as white as the snow outside, light blue horns emerging from his skull. He donned an exorcist cloak, specially made to fit him, the Paladin pin on the chest. Under the cloak, a buttoned black shirt clung to his toned torso. His body was young, fit, and healthy. He was still considered a young demon at 70 years old, his body was aging slowly. He looked to be in his early 20s. Meanwhile…
His baby brother slept, undisturbed, on the hospital bed. At first, Rin made fun of his friends and brother for their wrinkles and hair changing lighter. But when Rin had to wait for them to catch up with him, he began to worry. Then Bon retired to take over his family's temple, taking Konekomaru with him. Shiemi and Yukio had married soon after and with the birth of their first child, they too retired. Shura, the unstoppable force that she was the first to fall. The woman was reckless to begin with, but that didn't stop Rin from realizing… he would be the last one left. Izumo and Shima stayed with him for a few more years but soon retired due to severe injury or a new life elsewhere.
Now… all these years later. Rin was the last one left, except for Yukio. Rin looked at his numb hand, sticking out the window. Numb. That was what he felt. He had screamed as Shura died. He had sobbed as Bon took his final breath. He held Konekomaru's hand, Kuro on his chest, trying to comfort the distressed confused man. He cleaned up what was left of Shima. He howled at Shiemi's side. He was silent as Izumo was laid to rest at her families temple.
Yukio's heart monitor was slowing. Different alarms chirping. Rin left the window, turning to his brother. Rin studied the aged face. He couldn't believe this man was the same one who he grew up with. He looked like Shiro… Rin smiled, tears pooling in his eyes. Not for the first time, he cursed his demonic heritage. Rin glanced at the monitors, slowly reaching out, he grasped Yukio's hand with his.
"Tell the Old Fart I said hi? And everybody else. Give Bon a good kick for me. Hug the girls and Koneko… Shima doesn't get any love… eh, give him a hug too. I wish I could. Maybe one day I could join you up there?" Rin's voice was hoarse, tears building, a headache throbbing.
"Rin…" Rin looked up, expecting this. Mephisto and Amiamon were at the open window. A dark cloaked shape at Mephisto's side, a scythe in skeletal hands. "I've held it off for long enough. It is time." Mephisto beckoned the black cloaked creature forward. Rin's flames appeared, spitting listlessly at Death.
"I'm sorry, My King." The ethereal voice spoke. The room grew quiet as Rin squeezed Yukio's hand. He turned back to look at his brother, startled to find tired turquoise eyes watched the demons. Yukio lifted a weathered hand towards Death.
"I'm ready. You'll be ok, Rin." Yukio rasped. Rin's knees gave out, his head landing against Yukio's chest. He couldn't look. But he felt it. He heard it. The gentle rise and fall of his chest ceased. The heart beat that he knew since before their birth slowed to a stop. Alarms wailed, Rin shuddered. He must leave now, before the doctors come. He kissed Yukio's cheek, then turned.
"Come. You will recover, little brother." Mephisto whispered. Amaimon beckoned him to the window. Rin looked out, wiping hot tears away. The snow had stopped. The Yukiotoko was gone so it seemed only fitting.
Rin took a running step and jumped out the window. He changed shape, a lithe body taking his place. Graceful paws padded through the snow. A raven flew over head, Mephisto's terrier trotted far behind with a green hamster. Rin's lynx body was the same color as his hair, spots of fiery blue along his body.
Kuro greeted him in his head. Rin's mind attempted to spill all his pain, fire licked his paws, melting the snow. Rin picked up the pace, emptying his mind. He had a babysitting job to get to. His friends left behind grandbabies who needed him. He would keep their families safe. Forever if he needed to. And that's just what he would do.