Disclaimer: I do not own fire emblem, or RWBY, so don't ask for things to be added in the next game or Volume
A lone figure wearing a coat with the hood up was walking through the forest as the sun was disappearing behind the horizon as he gathered fire wood, then soon a scream could be heard, causing the cloaked person to drop his wood and run to the source of the noise.
Once he reached a clearing a bunch of people wearing identical black and white uniforms with hoods and mask covering their faces entered as well. Each one was armed with a sword and a pistol, with the leader having a spear, and the moment they all came in view a man I his early twenties dived at them, stabbing one with a sword.
This caused the group to begin shooting at him, but he just stood there and took it all and raised his free hand and launched a blast of energy killing his target, then he started charging at his opponents and slashing through them almost effortlessly. Seeing this the hooded figure robed figure grabbed one of the forgotten swords from the ground and started helping the soldiers who were being slaughtered.
The man who was wearing a white jacket with a blue trim and his broad sword was glowing blue was surprised by the new inclusion, but he blocked the attack that came. He had dark brown hair that went down to his black eyes, and was moderately armored with two metal batons being carried on his hip, but most surprisingly were the wolf-like ears on the top of his head that matched his hair.
"Take your men and get help, I'll hold him off" the cloaked figure told the man with the spear, and he followed this command
"You have no place in this fight, leave and I'll let you live" the man said as he blocked another slash by grabbing the hand
"That's where your wrong" the figure punched the man in the face, but he just took the hit without flinching
"Can I at least have a name so I can send your family the body?" he asked as he knocked the sword out of his enemy's hand
"Robin, and I wouldn't worry about that if I were you" He said as he raised a gloved hand that a started cracking as electricity formed there
The man pointed his sword at Robin as a blue light started to coat the edges of the sword "You can call me Marrok" then he started attacking Robin, only for his attacks to be redirected by purple lightning coming from his hand, or just dodged.
This happened for a while until runes surrounded both of them and Robin pointed his hand at Marrok and yelled "Ruin" and a number of black crystal pillars came and held him in place as the purple electricity started to run through the crystals to Marrok, but when it did the electricity started to turn a dark blue and soon a blast of energy went in each direction, breaking the crystals and launching the shards in each direction, with a couple hitting Robin who was caught of guard by the attack and took all of the shards that flew in his direction while the blast blew his hood off revealing his silver hair and launching him backwards.
When he rolled over to his back a sword was stabbed into the ground where he was laying just a moment before, and he quickly got up while grabbing another sword from the ground and started parrying the attacks that came as soon as he got up. Soon Marrok grabbed Robin by the throat and pinned him to the ground and started chocking him, and as Robin was being chocked out he put his right hand on Marrok's face and a dark light surrounded them both
"Nosferatu" and as soon as that was said Robin could feel his strength return to him, and the grip on his throat weaken, but he could also feel something else happening, almost like he was becoming stronger, and soon a purple aura started to surround him.
Marrok saw this and let go of Robin's throat and got up and attempted to stab him, only for Robin to roll over and got to his feet and pushed Marrok to the defensive, then Marrok sent out another blast of energy launching Robin backwards again, but this time instead of attacking he sheathed his sword and grabbed his batons and went back to the offensive, this time managing to overwhelm Robin with his two weapons
This caused Robin to create more pillars, but this time he used them to block the onslaught of blows that he was taking, then he created runes above Marrok, and once the wall shattered, a large number of shards were launched down on him as Robin shielded himself from the blast Marrok had created, then he started waiting for Marrok to make the next move.
Marrok then put the ends of the batons together and the combined and created a staff, then he drew his sword and started to charge at Robin, who created crystals that rose from the ground that were aimed to impale his opponent, who just flipped over them and threw his sword at Robin, who side stepped it causing the blade to impale itself in a tree, then Marrock started attacking Robin with his staff, but each strike was blocked by Robin, but was being pushed back by the rapid attacks without any opening to attack during.
Soon Robin was pushed back to the trees and was blasted back again. when he regained his balance he saw Marrok putting his staff into the sword that was still lodged in the tree, then he pulled on it, showing Robin that the two have combined and formed a spear.
Now with his new weapon Marrok started trying to stab his enemy from outside his range, but Robin was currently dodging and parrying each thrust until he managed to find an opening that he used to start slashing at the warrior at close enough range that he couldn't defend the attacks or counter them, then another blast of energy sent Robin backwards
Immediately after regaining his balance Robin was hit by a beam of energy that knocked him back a couple feet, then another beam hit near his feet, but when it hit the ground ice formed there, trapping him.
"I got to admit Robin, your pretty good, but you still won't beat me" And as Marrok said the blade on his spear split in half and he aimed it at him as the blades started to rapidly Rotate and a blue ball of energy started to form "Sorry about this"
Robin braced for the attack but it didn't come, and when he opened his eyes he saw the man with the spear from earlier creating a shield of green energy protecting in front of them which was blocking the laser that was aimed for him, then when the attack ended he pointed the spear at him and started launching lightning bolts at Marrok, then several other soldiers came ran up and started shooting him causing him to start running in the other direction
The soldiers were about to chase him before their leader told them to "Leave him, it's probably a trap, Mitch, would you be kind enough to free our friend." And the soldier named Mitch did as he was commanded. "We should go before he comes back with reinforcements"
"Hang on for a second, who are you, and where are we going?" Robin asked as he was freed from the ice
"We are members of the White Fang, and we will be regrouping with the rest of our forces, would you like to join us?" The spearman asked as he and his men started to leave "But if you don't want to we will still be willing to reward you for your efforts"
"I'll think about your offer, let's go"