From Betrayed Sekiryuutei to The World's Strongest Nikke

Chapter 1: The Return of Nikke/Sekiryuutei in DxD World

[17 Years later]
(3rd POV)

It's been 17 years that Rapi was born into this world where there are full of ruins and destruction that is caused by Raptures. She has been living in countless battles, she killed countless Raptures, and she always complete her missions from the higher ups. She is also good at leading her team: The Counters, on every dangerous mission and she was always been a strongest of all Nikke. During her mission with her team, she met her commander and a Nikke named Marian and aid them on the mission but that's when she realize that Marian was corrupted, then she and her team fight back against the Rapture called Blacksmith who happen to kidnap Marian. But after they defeated the Blacksmith, Marian was still corrupted and damaged however Marian was killed by the hands of her commander who is dearest to her. After that, Rapi together with her commander and her team go to their long journey. In every event of their long journey, she face many battles that she and her team work on even if she faced any corrupted Nikke, she also defeated Modernia who happen to be Marian. Rapi did her best by using her trump card called Red Hood to defeat Modernia and she was able to brought Marian back to her senses, which Rapi accepted Marian to become part of the team/family. She always care for the others like her family, even though if she wasn't a human, she can feel emotions just like humans and she always wants to do the best for her team and her commander.

This time, Rapi was called by her commander in the office which she always follow her commander's orders. When she arrives at the office, she knocks the door 3x which her commander tells her to come in. Then she enters the room as she sees her team, and even Ingrid and Andersen which she asked them.

Rapi: "Commander, Deputy Chief Andersen and Ms. Ingrid, why do you call me here?" She asked him.

Commander: "Well, Mr. Andersen was gonna tell us the mission. We don't know what is it??" He said to her as he doesn't know why.

Andersen: "Ahem! Okay then, I just called all of you here because there is some sort of like Rapture's project. We don't know what is it but make sure that whatever the Rapture built must be destroy without any trace. Raise your hands if you have any question?" He said which none of them can raise their hands except for Rapi who raise her hand and ask a question.

Rapi: "Deputy Chief Andersen, I know that this mission is important but how come we so sure if this mission might be a trap?" She asked him which most of her team agrees with her opinion.

Ingrid: "Hmm, your right. If the mission might be a trap then all of you must abort the mission and make sure you should contact us first so that we will send our air support to fetch you all and escape from the Rapture. We can't risk your lives if you were get killed by these raptures. (Look at Commander) Commander, its your responsibility to take care of these lovely Nikkes." She said to them as she always care for Rapi since she is her greatest pride.

Commander: "No worries Ingrid, I'll take care of my Nikkes. It is my responsibility to protect them as their commander, and now then, shall we head for our mission, girls?" He said which every Nikke on Rapi's team began to support their commander.

Rapi: '(Sigh) Another mission to do, what could go wrong??' She said in her mind. Then another voice was heard in her mind.

??????: "Indeed, you should be careful on your mission, partner." He said which Rapi was confused who said that to her but it might be her imaginary friend in her dreams. Although, she usually heard that voice eversince when she was alone or on her mission like someone giving her an early warning. Nonetheless, she and her team decided to go on the weaponry and armed themselves with weapons before they head on their journey.

(Timeskip)

Somewhere in the ruins of Tokyo City, the team Counters and their commander were heading to their pinpoint location which Rapi was infront to guard her team and her commander. Once they arrived, they see an unknown machine that is in the middle of the open area.