Trouble

It was all he could do to keep his anger at bay. He was not allowed to feel this wrath boiling within, so he took great precaution in finding calm before finding Eireka.
He rolled his shoulders, craned his neck from side to side and with a heavy breath he jogged up the stairs, or at least what was left of the stairs. After the attack of that creature last night, the castle looked more like an ancient ruin now. Still won't stop Eireka from .... He couldn't finnish the thought, in doing so would surely reawaken that fury that was turning deep within himself.
It didn't take him long to find the room where they resided. He simply followed the strongest stench of sex and alcohol. He thought he would be able to handle the sight. He should be used to it, he hunted countless demons, many of whom he caught "in the act". But this only ripped through him and beyond his control, he exploded.
They were on the bed... well at least two of them were. The other seemed to have been shoved off. They were unconscious now. . . probably from the exertion. Eireka laid on the bed, her breaths soft and peaceful... So he surged up next to her bringing her up effortlessly.
"Hey! What the fuck!" She screamed, scratching and kicking him with all her might but he was unfazed.
"Shut up Eireka and stop fighting me, I am NOT in the mood."
"The fuck if I care! Let me go, fly boy, or i will rip off those pretty little angel wings, one by one." Her threats met deaf ears, he was past being lenient with her. Anytime he was, he always suffered.
And as he walked down the degraded stairs and out a near hole in the wall, the familiar dark presence purred at his reaction. He instantly thwarted the force but he had to question why it was rising almost frequently now. When ever he would feel anger, lust, when ever he was at such a proximity to Eireka...
Great, now you've let a demon get into your mind. 

Their meeting

He surveyed the scene. Blood covered the walls, bed, it dripped from the ceiling even. A fire was burning , perhaps to erase the evidence? No. Demons did not care for that, they enjoyed watching as their "work" was witnessed by the humans.
He glanced at the human that lay splayed on the bed. Slowly he realized the male (or once male) had been . . . He shivered.
He ran a slow thumb over the hilt of his sword, knowing already that this demon would put up some fight. She would probably be a vicious beast, one with a merciless heart, if she had one. He turned to leave suddenly hearing an array of curses coming from outside. Curious, he stepped out immediately his gaze landed on a small female. She was yelling at a box she held in her hand as though it would respond her.
Instantly he knew, thats the demon? 
He turned to face her and as he did so she turned to face him. Her eyes found his and she eyed him suspiciously. Daren tensed, ready for a fight when the female raised her eyebrow, "Oh fucking fantastic. . .  what the hell do you want? Did I forget to pay you? Damn. . . maybe I can pay you some other way. "Her lustful gaze ran up and down Daren's body. He stood his ground, this might be more difficult than I thought. 

First encounter

Daren walked towards the house of Lucifer's son, Lucian. His strides were long and certain. The hilt of his heavenly sword banged lightly against his waist. He arrived at the door, with a soft flick of his wrist the door opened silently.
His keen sense of hearing heard moans and sighs coming from up stair. He went up, slowly, silently. The noise grew louder until he found the source. There in a massive king sized bed, under a dark blanket was movement. He tilted his head in confusion. Is that Seraphina? 
He heard a female cry out in... lust? He could smell it in the air but their actions confused him some what. . . was this what they called... sex?
The female arched her hips, allowing the male on top the drive deeper into her. There were soft loving murmurs coming from the male. . . Lucian... yes... it was him. He was sure of it. But who was the female?
He soon found out when Lucian threw his head back, yelling her name as he found his release.
Well you got over it fast Sera. . . He thought blankly as he cleared his throat to get their attention.
Lucian turned his head to look at him, his eyes still glazed with his earlier passion. Seraphina saw him and her eyes went as round with shock. She yelped and pulled the cover over her, Lucian had no shame as he smiled wickedly at the angel. Daren stared emotionless at the demon as he leaned over and placed a kiss to Seraphina's lips and got up from the bed. Daren turned his gaze away as the demon dressed himself.
"Well well, what's up Daren. Long time no see." Lucian sneered.
"I am here for Seraphina." Something dangerous crossed Lucian's eyes as he bared his fangs.
"I want you to try to take her from me." Lucian stood protectively in front of the frightened fallen.
Daren thumbed the hilt of his sword. "So be it."