Lets try this.

The airplane's hum heard in the background, they just sat there, staring at each other. The other people didn't even notice them, probably because they couldn't even hear or see them. They were in between this world and the next. And if need be, they would spring into action.

"Ok, so explain to me again, who are you, and what do you do?"

The other sighed "I'm a soul reaper, we guide the dead to the other world. Anytime theirs a possible risk for people to die, we're there. So every flight, every car, every thing that has a danger, we're ready. Most houses have atleast two of us."

"This sounds like Bleach"
"It's not Bleach. You've fought demons before, and you know they're nothing like in Bleach"

"They eat souls like in Bleach."
"And they turn them. You're an Agent, you know how it works."
"Ok, fine. Then what do you do when you're attacked by a demon?"
"Same thing you do. Kill it."
He directs the first's attention towards his swords, both of them only have an edge on one side, and on the other, where the blade becomes the hilt, turns another hilt 90 degrees from the normal one. An interesting weapon, if he didn't already wield his that way.

"Right. Then why does the Agency never talk about you guys, if we obviously have the same goal?"
"Well, we don't have the same goal. You protect the living and I protect, and guide, the dead."

"But we have the same goal, protect the people. I don't understand why we couldn't work together."
"You really don't know, do you? The Agency was once apart of us."
"Once apart of the 'Soul Society?'" He snickerd.

A flash of white came, and within moments, both had drawn their weapons, letting the blade rest on their forearm and struggling with each other. The Soul Reaper had gained beautiful white wings and was using them to push himself further then his normal body could. The people in their cabins had noticed the flash and felt the shock, but other then that, they were oblvious to the 'battle' going on behind them.

"You just don't get it. This isn't a joke. If we wanted to, we could leave your soul here, in this multi-plane, and let you fend for yourself from all the horrors the demon have to offer. You won't have fully grown into your spiritual energy in this realm, and your weapons will be inaccesable to you. You'll be worthless, a free soul to even the weakest of monsters."

They lower their weapons and sit back down.

The Agent sat back in his seat, letting himself get comfortable again. "Then let history lesson begin. What sepperated the two? And why has the Agency never mentioned the Soul Reapers before?"

"Because" the angelic figure began "there was a civil war for hundreds of years that's purpose was only that of pride. It's why Agents can be mortals and Reapers cant. It's why the Agency bars weapon use." He took a deep breathe. "And it's why us Reapers are dying off. The living with spirtual potential once became Reapers. But now they're becoming Agents, and not wanting to do the same job in the afterlife."

The Soul Reaper looked at the floor, contemplating what to say next. He had done this job since he died in the 1920's. It was getting old, but he was still young, spiritually whise. "Maybe the fact that you're here is a good thing. Maybe you can start recruiting Soul Reapers for me. I just need one good word in the Agency."

The agent stood up. "I'm just here to protect the girl. Let me do my job and we can both pray that you wont have to do yours."

The soul reaper smiled. "Pray? I've got a direct line to heaven right now.It wont do us any good. You and I are who they send when people have a prayer."

"If this whole thing goes over well, and you teach me a bit more about what you know, I'll see what I can do. Deal?"

"Deal."