A True Demon

A new demon

Rin and Yukio got all their stuff ready and headed towards the Vatican. Shiro was there discussing something shura. The twins snuck in and started looking for their grandfather. Their mission was to strike fear in the Vatican by killing their leader.

The twins had their target in sight. If you're gonna kill someone might as well make it fun, right? They closed off all exits but one. Then they slowly walked up to their grandfather.

"Y-you two! What are you doing here?!" Their grandfather said and the twins just laughed and said "we're bored so we're getting some revenge for our father. Since you are immune to his flames we came to kill you so you can be tortured for eternity in hell!" He started running towards the exit but was stopped by the twins.
As Shiro started making his way to the exit he heard screams near by. He took out his guns and walked in the room. "What the hell are you two doing?!" He said, Rin through a knife at his grandfather and started laughing. "You missed fucktard!" Yukio said and started laughing as their "target" tried crawling away. Shiro tried to help him but the twins got to him first. "Let's get this over with I wanna check this place out." Yukio said and shot him in the head. "You didn't have to do that! What is wrong with you?!" Shiro yelled glaring at the twins. "What? After we killed him we were going to look at the weapon stash you guys hide under the building. Wanna come?" Rin said with a grin. Shiro sighed and said  "you can't get in there it's guarded by 3 solid doors of holy silver and its heavily guarded. Even I tried to get in there when I was younger." "Yeah but it's gonna be way easier with demon powers." Rin said as he showed him the smoke coming out of his hands. "Come on, it'll be fun." Yukio said with a smile, Shiro sighed again and nodded.

They made it to the entrance, Yukio was making a some kind of a portal so they can go in. Once they did it was beautiful, the walls were lined with explosives and there was rows of guns and knives. Bins were filled with bullets and the racks were filled with swords. The twins face were filled with joy as they ran around. Shiro smiled and said "somethings never change." Ever since they were little they always loved weapons or fireworks. Shiro snapped out of his trance when he saw Rin flying and smash into a wall. "That...was...awesome!!!" Rin said laughing as Yukio reloaded his new weapon.

They spent hours in the weapon chamber. Shiro enjoyed watching them, no matter how old they get they still act the same. They left with as much weapons as possible. When the other exorcist entered the Vatican you can hear the screams from a mile away. The twins sat on the roof watching the exorcist running around and screaming like idiots. The three of them were laughing their heads off until something caught their eye. A few miles away they saw the Ghenna gate, the twins started heading towards it as Shiro stayed behind.

The twins stood in front of the gate and waited. Soon they saw something crawl out of the portal.

A girl?