This one-shot was asked by 'RainbowFatCat' who asked: 'The kids meeting Grandpa Satan!'

Which I was actually planning on doing at some point it was just figuring out on HOW the kids were to meet him; either going to Gehenna or through someone getting possessed. I thought Gehenna felt too forced into a one-shot. The ending of this might seem a bit rushed because I had NO clue on what to write for Satan, but at least it's something. XD

Also this will be the first one-shot where the POV's change halfway through. I decided to do that because it'd make it more interesting if in some chapters the POV was from one of Rin's kids. Obviously some you might be able to tell which of Rin's kids I favor more, but I try not to show favoritism. XD

Story 3: Parallel Hearts

Rin's POV

"Daddy?"

I turn my head to face the voice that had called me.

It was my daughter.

Her bright innocent smile was that which replicated her Mother's; her bright green eyes shining. Her short blond hair neat and her butterfly hairclip holding her fringe back. She was the definition of innocence … just like her Mother.

I bend down to her eye-level and smile at her. "What is it, Hana?"

She just held her hand out to me and opened her clasped hands with a large grin on her face. When she opened her hands; my eyes widened.

How did I not see this coming?

In her small hands was a Coal-tar demon. They are the kin of the Demon King of Rot and are known to cause infection if you breathe in too much of their toxins.

My human daughter seemed to be holding one of said demons.

"Can I keep it, Daddy?" she asked me, innocently as her big eyes looked at me.

My attention snapped back to her and I gaped.

She wanted to keep this demon!

Why?

I'll never understand the curiosity of my children.

They're so different compared to Yukio and me. My brother was afraid of the demons that surrounded him and I was unaware of their existence when we were kids; but my kids … Hana seems to embrace the demons and Yun is like me; he has no clue about them and thinks his sister is pranking him.

I just gave Hana a small smile and shook my head at her. Putting my hand on her small head to lightly stroke it to calm her in case she started to get upset about what I was about to say. I'm still getting used to being a Father, but it's been five years now and I'm getting the hang of things now. "Sorry, Hana, you can't just bring that into the house."

She looked down at her hands and then back up at me in confusion. "How come? It looked lonely, so I brought it home."

I chuckled at that. "A demon isn't like a stray cat or dog, Hana. They can hurt you when you least expect it."

This just caused her to puff up her cheeks in frustration. "But you're a demon, Daddy. And you don't hurt us."

A smile spread across my face at her comment.

That was true.

"Well, technically I'm half-demon, so I'm also half-human too. But…" I finally stopped stroking her head and put my hands on her shoulders and looked at her seriously with a hint of concern in my blue eyes. "…that's because I love both you and your brother very deeply. My human side is stronger than the demon." My eyes looked down at the Coal-tar now. "Hana, taking in a demon is a very big responsibility. I don't want you to hurt yourself because you see demons as pets or friends."

"But … Daddy…"

"Hana, don't use me being a demon as an excuse to keep it."

It always feels weird to me when I have to be strict with my kids.

Now I know how Dad felt when he was strict with me and Yukio; mostly me. But I have to be strict with them whenever things like this happen. I don't want them to get themselves hurt.

I noticed her bottom lip tremble and she looked back down at the demon in her hands and nodded her head, slowly. She walked away from me and set the demon free out the window. I watched her do this and sighed in relief. I know it was hard for a child to accept these kinds of things, but it was how the world worked.

Our world.

I saw her trembling and held my arms out to her.

"Hana, come here…" She ran over into my embrace and I wrapped my arms around her. Her tears falling onto my exorcist uniform as I shushed her. "I know you think that all demons are good because I'm a demon. But not all demons are like that. Some demons want to do bad things, Hana. They aren't like me or Kuro; they just want … to see Assiah burn…"

The Later Years

Ryunosuke's POV

"Shut up, Yukio! I can take care of this on my own!" I overheard the argument between my Dad and Uncle.

This caused me to sigh. They had been fighting a lot over the past few months. It wasn't something neither I nor my sister liked to see. We loved both Uncle Yukio and Dad, but we never understand half their arguments. Some of them were due to Dad wanting 'to do his job' so he could get more money to help pay bills and buy food for us then the other half … we never really understood.

I mean, being thirteen we were able to understand a little more on their arguments, but it was also like they were keeping things from us; Dad especially. I was currently sitting on the couch; watching Dad and Uncle Yukio argue over by the front door as my younger twin sister played with her pigtails beside me. She always had this sort of 'sixth sense' because she was able to see things I wasn't like these 'demons'.

I never believed her because I never saw them.

She even claimed one time that Dad was one.

Yea, right.

As if Dad was a demon.

That'd mean we were demons too along with Uncle Yukio…

Right?

Uncle Yukio glared at my Father; a shine crossing his glasses to hide the clear frustration on his face. "Rin, I can tell that you're upset right now, but stop taking it out on me!"

"How can I not be upset about this!" My Dad held up his hand as he counted down his fingers. "I have to pay bills, I have my job as an exorcist to worry about, and I look after two kids…" He was soon cut off by my Uncle slapping him across the face. This jolted both me and Hana to look in their direction for this split moment as my Dad's eye were on the floor.

"I know your stressing out about all this work piling up on you, but you have to stay calm, Rin!" Uncle Yukio finally let it out at my Dad.

Dad let out a small chuckle as his gaze looked back up to his brother. "I guess I have been getting a little in over my head."

"If it's been stressing you out this much why don't you just ask me for help?"

This just caused Dad to give a small smile to Uncle Yukio. "…Because I didn't want to bother you with how much work you get."

Uncle Yukio just seemed to stare at Dad for a moment as if contemplating his answer. "Rin, you work hard for your job; taking double shifts if need-be just so you can get enough money to help support both you and the twins. Surely there's some way I can help you?"

Dad just shook his head at Uncle Yukio's offer and headed towards the kitchen, waving his hand. "Nah. I'm fine, Yukio. You don't need to worry about me. I've got this … under control…"

I instantly stood up at hearing how distant Dad's voice sounded. Uncle Yukio had rushed to his side, but had frozen once he had gotten close to where Dad was. His hand shaking near the gun holstered on his belt. Hana rose up from her spot on the couch and looked to where Dad was and gasped. My eyes gazed over to my Father and they widened.

My Father was absorbed in fire; blue fire. The flames licking at his body as if it was a coat; his pointed ears had elongated and he had a … TAIL with a flame tipping its end.

Hana rushed around the couch towards Dad, but was stopped by the outstretched arm of our Uncle. "Don't. That's … no longer your Father."

I walked around the couch and stood beside my sister, staring at the flaming figure that was my Dad. "What do you mean?" I asked, confused at what my Uncle said. He just gave me a sorrowful look and turned his attention back to Dad.

It was silent.

Painstakingly silent.

Before laughter broke it.

It was insane laughter; and it was coming from my Father. I have never heard him laugh like that before. I've only ever heard his cheery laugh or at times a bitter one … never a crazy one like this.

"Finally … I finally possessed this body. I can finally bring you back to Gehenna, my boy."

His voice was distorted.

It sounded nothing like the cheerful voice I'm so used.

The voice I grew up listening to all the time.

But ... what's Gehenna?

Possession?

What's he talking about?

The cocking of a gun caught both mine and my sister's attention along with our 'Father's' attention. "Let my brother go. Now."

'Dad' stood to his feet; his tail flicked behind him in what looked like annoyance. "How about no? Last time I got this chance to bring him home he was still a mere human, now his powers are awakened. He also seems to have quite the knowledge on how to use them." Whoever was making Dad talk turned towards us and I finally saw the large fanged grin on his face along with the red-rimming his pupils.

Wait, a minute … human?

Powers?

What's going on?

Is someone really possessing Dad or is this another one of Dad's pranks?

The blue eyes I had known my whole life that had been full of care and honesty were now jagged and crazed. They moved towards me and my sister; Hana moving behind me and Uncle Yukio for protection. She could tell this being … was not our Father, but something else entirely.

The large grin on his face simply grew wider at seeing us and it made me feel … uneasy seeing this large grin on Dad's face. It didn't feel right seeing that grin on him. He's meant to be smiling not ... grinning like a mad man. "Well, well, I certainly didn't expect this. One of my sons had a little fun while up here."

Huh?!

Sons?

Hang on … does that mean whoever is possessing Dad is … no way…

"I'm telling you for the last time!" I heard Uncle Yukio shout as he began to lose his temper; and I know he hardly ever does. "Stop possessing Rin, Satan!"

SATAN!

Hold up! WHAT!?

I turned toward my Uncle with shock on my face. "What did you say? Satan? Dad's being possessed by Satan!?"

I saw my Uncle twitch as if he knew he made a mistake by saying what he did.

Yea, you did.

Now you got me curious.

How the hell is Satan possessing Dad?

Why was he saying he should bring Dad 'home'?

Just ... what's going on!?

However before he could answer me the laughter from Dad or … Satan caught my attention. "So, you're my second youngest son's offspring. Never thought he'd have the guts to considering how dumb he was. Never even knew he was half-demon." This made me freeze. Dad was half-demon? If Dad was half-demon … then could I also be one too? And what about Hana? And Uncle Yukio? And what did he mean by 'second youngest'? Did Dad have more siblings than Uncle Yukio? I felt his eyes on me and I gulped. "I wonder which one inherited the blue flames."

Uncle Yukio finally got his nerve back to hold his gun back up to point at … Satan's chest. That sounds weird to say. "Only Rin knows that, so don't try and pry that information out of us."

This only caused a chuckle to escape the demon's mouth. "I could take all three with me to Gehenna…" His eyes travelled to Yukio with a hard glare. "…and leave the weak human here."

My eyes widened at this. Dad would never say that to Uncle Yukio. This 'Satan' must definitely be possessing him, because even if this was a prank … Dad wouldn't stoop that low. He'd stop before he got that far. Uncle Yukio meant everything to Dad just as much as we did. He'd never say he was 'weak'.

Before any of us could voice our opinions; 'Dad' grabbed at his head with a low growl coming from his throat. "My brother is not weak. Now get out of my body!" Dad sounded pissed. He sounded like he hated Satan; I mean he's the King of Hell or Gehenna or whatever it is; but Dad looks … really pissed off about this.

As soon as those words left his mouth; Dad's legs buckled in underneath him and he collapsed to the ground. Uncle Yukio and Hana were quickly by his side while I was just staring at the floor at where Dad lay; confused and … betrayed.

I had been lied to my whole life.

My Father wasn't human, but a half-demon; and the son of the most powerful demon of all … Satan.

That meant … Satan was my Grandfather.

How screwed up was my family and I never even knew about it?

Why was I never told?

To keep me safe?

Or … was it just so Dad could raise me as a human?

I … just don't know anymore.

How much of my life has been a lie?