Updated July 5th, 2017 6:57PM

Disclaimer, I do not own blue exorcist.

When Yuri Egin made a deal with the demon called Mephistopheles to keep Satan's child safe, she didn't think it would turn out like this.

She knew he was a demon king, but he was kin to her lover Satan, so she felt obligated to trust him.

She meant for her children to be raised together, to prove that humans can co-exist with demons, and her sons would be the ones to achieve her goals and make her ambitions a reality.

Her intentions were never this.

Her sons were separated and would most likely remain that way for life. He cheated and transferred all of Satan's power to Rin, so that there was only technically one son of Satan.

Now there was no unity involved in this at all, and Rin would be used as a weapon to achieve Satan's warped version of her goal which was the assimilation of Assiah and Gehenna, destroying the two dimensions.

He had good Intentions, but he still had much to learn about Assiah, and now she couldn't be the one to teach him, this was a colossal mistake, and it was completely her fault

Yuri was slowly ebbing towards the mystery that was death, contemplating her remaining options when Shiro walked in.

She looked up at the man who looked down upon her with sad eyes.

He and she both new that she didn't have enough time left. Shiro started making his way towards Yuri emotionlessly.

Even though he was the paladin he didn't think he had what it took kill a child, even if it was the son of Satan so he tried to become as emotionally detached as possible to lessen the amount of mental trauma that he would sustain from this cruel task.

When he finally made his way to Yuri, he asked

"Where's the bastard son of Satan?"

To which she responded by handing him a bundle. She told him that his name was Yukio and that he was completely human.

Shiro didn't think she was telling the truth, but he didn't want to press the woman, as she had obviously, judging by her condition, been subject to mental and physical trauma.

He held Yukio for a moment looking the baby boy over for anything that might be considered demonic but was interrupted when Yuri spoke again. Her voice was strained and seemed to be distant

"Shiro, take good care of Yukio, and make sure he grows to be a good man, deal?"

Shiro frantically scrambled to try to revive Yuri, who now wasn't breathing, and now whose pulse had flatlined, but it was to no avail, so he did the only thing he could think of, he called Mephisto, he picked up the body of his friend, put it over his shoulder, and with Yukio in his arms, he walked out of the cave, to meet his friend at True Cross, but not before muttering one final word,"deal."

He was going to honor her by fulfilling her last wish.