Okay so I am fixing up this poor neglected story. I am now full fledged back into the Blue Exorcist fandom. THIS FIC IS NOT ABANDONED I AM JUST HORRIBLE AND NEGLECTFUL. ENJOY!

Prologue

Yukio stood outside the now quiet room, his mommy was taken in there when she started screaming. He hoped his mommy was okay, he had remembered hearing the word baby. Maybe he would be a brother? If so he would the happiest boy on the planet. He stood there anxiously waiting, the long he waited the more agonizing it became. It was when the screams stopped from his mother a new cry filled the room. It was a baby's cries.

Yukio's eyes widened. He was right! He was going to be a big brother! He tried to put his ear against the door only for it to be opened up by someone from the inside. He would have fell had it not been for the strong arms that picked him up and lifted him into their arms.

"Yukio?" The person asked, Yukio looked up to see his mommy's new husband. His name was Satan. He was very nice to Yukio, he didn't understand why people were scared of him. After his daddy being gone for years Yukio needed a male role model, it just happened to be Satan of all things to fill that role.

His step-daddy had medium length hair that his mommy loved to braid flowers into. Even though the demon king stood tall and intimating Yukio liked him anyway and he made his mommy smile when his daddy was gone. He looked up at the demon with an innocent look.

"Hehe.. okay Yukio. Would you like to meet your baby brother?" He asked quietly laughing when Yukio nodded so fast he nearly gave himself whip lash. So it was a boy! He had a baby brother!

"Okay, come on tyke. Just be quiet, your mommy is very tired. She will need her rest." He told him, Yukio nodded. Satan brought him over to the bed and set the boy on it.

"Hi mommy, is that my baby brother?" He asked trying to look into the wrapped up blanket.

"Yes baby. His... name is... Rin. Yukio... do you want to hold him?" his mommy said quietly with a smile, she was still breathing heavy.

"Yes mommy." He told her. Satan help the two, he fixed Yukio against the pillows and gently took the baby out of Yuri's arms. He gently placed the small baby in Yukio's arms and told him how to support him. Once Yukio was settled Satan stood close anyway in case anything happened.

"Why is he on fire?" Yukio asked looking up, wondering why the fire didn't even hurt him.

"He's half demon sweetie. He is like his daddy and me." Yuri explained as simply as she could.

"Oh." He said, it was so cool to him. He had a baby brother and he had superpowers!

"I'm a big brother! We can play and I can teach him stuff. And, and it will be so much fun!" Yukio said happily but careful not to jolt the baby. He was just so tiny.

"Wait until he is a bit older baby, then you can definitely do that." Yuri said smiling. She was happy to have her now two boys sitting like this. She knew Yukio would be a good older brother.

The baby stirred in Yukio's arm and opened his eyes. They were a shocking blue, just as Satan's are. They even had the same blood red iris. The baby looked at him for a minute before breaking out in tears and crying loudly. He shrieks were so loud! They had startled poor Yukio, Yuri laughed a bit and took the baby back into her tired arms.

"Let's let your mommy sleep bud. She and the baby need rest. We can go see the others. I'm sure they want to hear about their new baby brother." Satan said taking the child into his arms.

"Okay. Night mommy." Yukio said kissing her cheek when he leaned down. "Night Rin." Yukio said smiling down at his baby brother. Yuri said good night as her son was taken out of the room.

'I promise to protect you Rin.' Yukio thought to himself. 'Forever.'