Disclaimer: I don't own RWBY which is owned by Rooster Teeth. I also don't own Doom which is owned by ID Software.
Ozpin got the news that a green armored man has arrived at Beacon Academy.
"A man in green armor?" Ozpin wondered as he drank hot chocolate from his mug. The Headmaster of Beacon Academy saw the Slayer through the cameras from his scroll as the strong human was making his way to the elevator. The elevator opened up as the Slayer arrived and entered the office.
"You do not seem like one who fools around. So if you wanted to attack me, you would've certainly tried to shoot me as soon as the elevator reached my office," Ozpin said as he calmly took a sip from his coffee mug. The Slayer was silently impressed by his analytic skills.
"I told you he would be of help toward our goals," Samuel Hayden said.
"What's that? This...does not seem to be your voice, somehow. But someone else's. This voice sounds...familiar... Who are you?" Ozpin asked as he felt like he knows that voice from somewhere.
"Well, allow me to introduce myself. I am Samuel Hayden, and no I am in no way related to this man right here," the cyborg said.
Ozpin raised an eyebrow.
'Must've been a mistake, then. I do not remember anyone by that name,' Ozpin thought.
"If you are wondering. We seek to finally put an end to Salem's plans," Hayden said.
Ozpin frowned. These two knew of his greatest foe. At least they were here to stop her instead of siding with the witch.
"If you are wondering if we are trustworthy or not. Then earlier, this man, the Doom Slayer, has successfully killed off most of the Grimm found at Mountain Glenn and the surrounding area," Hayden said, seeming confident.
"So it was you, I see," Ozpin said. "Speaking of which how were you able to quickly get here from Mountain Glenn? It would usually several hours to get here on foot."
"Through gateways," Hayden said.
The Slayer nodded in agreement.
"I appreciate your concerns an-"
"I have reasons to see to it that the Fall Maiden is fully recovered, as well as find the one responsible for her state," Hayden said, interrupting Ozpin.
"...I do not think you will answer me if I ask you about how do you know about her…" The Headmaster of Beacon Academy said.
"It is as you said, but I will leave you the time to think about it," Hayden said sounding vaguely smug. "But back to our main subject. We have to bring up a major concern. While the Grimm are dangerous, there is a much worse foe that will show up."
"What did she do this time?" Ozpin asked, sounding concerned.
"The demons of Hell have showed up on Remnant," Hayden said.
Ozpin remembers driving them off in his first life. They were very dangerous to deal with, but he was able to defeat them...it was now displeasing to see them return, which could only mean...
"Are they going to invade Remnant?" Ozpin asked.
"You are correct," Hayden said.
Ozpin had a grim look, and said: "Well this is bad…"
"The Slayer here will make sure the demons will be dealt with...though your huntsmen have to be prepared for the incoming invasion by the demons," Hayden said.
"I am afraid that you are right…" Ozpin said as he is dreading the fact that things will get out of hand.
"The Slayer here will help with teaching them and most likely provide them the means to counter the demons," Hayden said.
"If the demons are as strong as I remember, then I can only count on one hand the Huntsmen who could stand up to them…" Ozpin said.
"Some of the Huntsmen you hold in high regards, I presume. Such as…" Ozpin said.
Cut to Qrow sneezing at a bar before going back to Ozpin's office.
"But we need the other huntsmen to be prepared to increase Remnant's odds at surviving. The demons are not like the Grimm, they are far more vicious and cruel than them," Hayden said as he remembered what they were capable of back on Mars.
"I understand. I have a few students who have shown great potential," Ozpin said.
"Name them for me. We need all the help we can get with the situation at hand," Hayden said.
Ozpin wrote their names down.
The Doom Slayer took the note to see who was on the list.
Among those names are Ruby Rose, Yang Xiao Long, Jaune Arc, Weiss Schnee, Blake Belladonna, Lie Ren, and Nora Valkyrie."
There were a few other names on the list, but the name on top was Pyrrha Nikos.
"Ah, her. So you think she could possibly be one of the best huntsmen?" Hayden said.
"She is a prodigy. Her skills are beyond the rest of her peers. I have great plans for her," Ozpin said.
"Did you want to integrate her into your inner circle?" Hayden said.
"Maybe…" Ozpin said as he was still wondering how he was able to know all about the Maidens and Salem.
"Did it have something to do with the Fall Maiden?" Hayden said.
"You can say that…but that's if the current Fall Maiden cannot recover…" Ozpin said as he took a sip to calm his nerves.
"Well, either way. The Slayer here will personally seek to eliminate the Grimm presence and the demonic presence found on Remnant," Hayden said as the Slayer simply loads his Super Shotgun up with ammo.
"I thought so," Ozpin said.
"Now then if you will excuse us. The Slayer has to finish with the last remaining Grimm and demons nearby…" Hayden said. The two left leaving Ozpin alone to his thoughts. He was curious about Hayden and wondered why he felt familiar.
Hayden took a sip of hot chocolate from his coffee cup as he kept thinking about it. For some reason, Samuel Hayden can know A LOT of things no normal man should know about, and his voice sounds very familiar. He's sure he heard his voice before, back during his first life as Ozma.
'Samuel Hayden... Sounds a little like...Samu-' Ozpin then did a spit take at this his eyes wide before he can finish his thoughts.
"Oh, my Oum…" Ozpin said as he began to realize it was an old ally of sorts from his past.
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-Meanwhile-
Back with the Slayer, he came down the elevator. He knew what to do which was to annihilate the Grimm population into oblivion while dealing with the demons. As he was walking down the hallway, Team JNPR and Team RWBY arrived. The Slayer noticed them silently.
"Oh my! WHAT IS THAT?!" Ruby said as she stared at the Super Shotgun with the Meathook. The huntsman in training seems to like the gun as she herself is a gun nut. Its hook looks cool and deadly.
"Well it looks like this gun...is also a grappling hook," Yang said with interest while looking at the Super Shotgun.
Weiss found that line corny.
Blake was just silently looking at the Slayer. The deadliest man said nothing.
"Hello there! I'm Nora and I'm wondering if you like pancakes?!" The energetic huntress in training said.
The Slayer simply said nothing.
"You shouldn't overwhelm others like this, Nora," Ren said as he was still a bit annoyed by Nora's antics.
The Slayer didn't mind her antics.
"Hello? Mister?" Ruby said.
She just realized why wasn't he talking.
"Cat got your tongue?" Ruby said with a smile.
Yang was grinning at this. Blake actually looked annoyed at this joke. Weiss noticed and was amused at this, so she chuckled at Blake's reaction.
Yang found Weiss rude, and said: "Hey don't be rude!"
She took Blake's side on this matter. As she tends to do.
Blake actually seemed to like the blonde sticking up for her
The Slayer still said nothing.
"Are you mute?" Jaune said as he was still wondering why the Green Armored Man wasn't saying anything.
"Oh hello there…" Pyrrha said in a friendly tone. The Slayer observed her by staring at the girl. "Um."
Pyrrha was uncomfortable at being stared at like that.
The Doom Slayer remembered her from the meeting. She was one of the top students. The one on top of the list.
The Slayer however has a job to do, which is to deal with the Grimm and demons in Vale. So he left.
'Why was he staring at me like that?' Pyrrha said as she was wondering why the Slayer was doing that earlier.
'I still hope he doesn't have a crush on her…' Jaune thought, referring to Weiss.
"I hope he likes cookies!" Ruby said with enthusiasm.
"I am pretty sure he does, maybe…" Yang said in support.
A/n: So yeah Samuel Hayden knows of what Ozpin is doing and Ozpin now knows Hayden actually is...well...that would spoil Doom Eternal. And yes our first ever interaction between the Slayer, Team RWBY, and Team JNPR.