I deleted my story berserker because I was not happy with it but I have been thinking of a story that focuses on the relationship between Vali and Issei because they are friends and rivals. I will keep this short and everything up till this point has been up to canon.

Who Can I Trust?

Three Factions peace conference

Issei POV

"Vali, you are with the Khaos Brigade!" I shouted in anger at Vali Lucifer the host of divine dividing and this generation White Dragon Emperor.

"Indeed I am my rival…" He replied calmly from under his balance breaker but I could see his grin

"But to be honest I am disappointed my rival is weak and was duped…" he said cryptically, I ignored his words. I needed to protect Rias and the others.

"Remember Issei you can only go into balance breaker for a limited amount of time" Azazel reminded me, I simply nodded. I made a note to thank him later for the bracelet he gave me. Although he was pretty calm despite losing an arm.

[WELSH DRAGON OVERBOOSTER BALNACE BREAKER!] The boosted gear roared

I was covered in my balance breaker for what was to be the second time, the first time was at the Raisers wedding to save Rias.

"You are going down Vali!" I roared

"Come my Rival don't disappoint me…" He replied is tone calm as ever and it frankly angered me how could he be so calm, so careless?

[BOOST!]

I lunged at Vali with my fist cocked back he waited until the last second before his fist reacted and contacted with my face. The blow was deflected by my helmet and I continued attacking, then I felt a sharp drain on me.

[DIVIDE!]

[BOOST!]

Was my response before I decked Vali in the gut. He replied by headbutting me sending reeling before following with an uppercut to my chin, his barrage did not stop he promptly followed with more attacks. He kneed me in the chest before he decked me in the face sending me backwards. I landed flat on my ass right in front of Rias and the others. I grit my teeth before I got up.

"How weak…. You were just an average student before and now you are the red dragon emperor but you still disappoint me…" Vali spoke with disdain

"You have point there Vali?" I snapped back at his response

"Yeah I want you to get stronger but it seems your master isn't suitable…" He replied

"What did you say about Rias!" I roared, Rias and the others watched on with concern

"Maybe I should kill one of your friends then you will fight better…" Vali said calmly as he hovered in the air, he summoned two balls of blue energy before he launched them at Asia

I reacted immediately [BOOOST!] and I jumped in front of Asia taking the blow for her.

"Issei" Rias and Asia shouted out in concern as I was launched backwards several meters

"Don't worry Rias,… I won't disappoint you…." I said proudly as I staggered to my feet, a smile of proudness and concern graced her lips but It was all the motivation I needed.

[BOOOST!]

[BOOST!]

"Let's do this Ddraig!" I roared before charging straight at Vali

"Good you still have some fight" He said with amusement as he stood waiting to receive my attack, I grinned I had him right where I wanted him.

As I got close I stuck my left arm out,

"ASCALON!" I shouted as the dragon slaying blade extended from my gauntlet, I could practically see Vali's eyes widen as he jumped back dodging the sword. But I pursued pressing my advantage, he managed to dodge three strikes before I got him with the fourth sending him backwards still standing but his balance breaker was down.

I could see his cocky grin but I could see a tinge of joy.

"So you are not completely weak…" Vali said as he wiped some blood calmly from his mouth, His divine dividing still present on his back.

"It's still not over though" Vali replied with a grin

[VANISHING DRAGON BALANCE BREAKER]

"What!" I spoke in astonishment; he could still activate his balance breaker

[The fight does not end until one of us is dead or unable to continue fighting. This is how dragons battle….] Ddraig chimed in

Vali then charged me; I was caught off guard before a punch to my face knocked me back into my senses. A [Divide] promptly followed.

I could feel my power drain and I grit my teeth as weather Vali's barrage of attacks trying to counter attack but he just kept pushing before he knocked me backwards with a roundhouse kick to the face.

I landed with a solid thud in front of Rias and the others.

"Issei!" Rias screamed with concern, she was going to come to me but was held back by her brother

"Rias! Their power has reached the point where they will vaporize anything in the vicinity" Her brother berated her

"But he needs me!" She shouted with concern, I grit my teeth. I could… no I can't fail her now!

I got up on one knee,

"Don't worry about me I will be sure to defeat him!" I told her with determination; she smiled back at my words

"The trust you put in her is endearing, dear rival…" Vali said in a sarcastic tone

"Don't insult Rias!" I shouted back

"If only you knew the truth rival" Vali spoke cryptically

"What truth? What are you talking about!" I screamed in confusion

"The fact that your master has only been using you… she doesn't care about you she even let you die to get your power!" Vali informed Issei while staring at Rias

"No she hasn't been using me! I choose to fight for her!" Issei said determined to ignore Vali's words

"And what do you get for your fighting, you have been near death, injured and what do you get her word of thank and a pat?" Vali said with venom

"Don't insult HER!" I roared using my anger to propel me forward my fist cocked back but he easily dodged me and head-butt me, destroying my helmet, exposing my face.

My eyes gazed back at his serious yellow ones as he held me by the neck of my armor,

"She let you suffer, she knew Yumma was going to kill you and she sat by and waited for you to die…" Vali told Issei the truth, Issei paused for a few seconds before he registered the words.

"What…" I spoke in disbelief

"Don't listen to him Issei! Trust me not him! He threatened to kill Asia!" Rias chimed in

"See; look at your comrades they refuse to look you in the eye…" Vali said while glancing at Akeno, Kiba and Koneko who indeed weren't looking at me… they looked… ashamed….

I freed myself from Vali's grip before turning to Rias. I locked eyes with her before I asked my question,

"Is what he said true?"

"Of course not! I only knew about the fallen angels after they killed you, it was coincidence that you picked up the leaflet!" She lied unconvincingly

"Rias…. I maybe be perverted but I AM NOT DUMB!" I roared feeling insulted she thought I would accept such a blatant lie

"You expect me to believe that it was coincidence I received a leaflet from your familiar that day!" I said raising my tone involuntarily, she couldn't make eye contact anymore and looked away.

The girl, I loved, the girl who saved me, the girl I fought for, Rias… I was nothing but a tool for her… I am a fool….

I grit my teeth and clenched my fists…

"I sacrificed my arm for you to save you against Raiser! I did your errands I trained all day for you! When I rescued from your heartless marriage it was convenient for you but when you knew I was going to die by Yumma's hands the first girl I loved, you didn't save me until it was convenient for you so I could become YOUR [PAWN]!" I shouted in anger, everybody stood silent as I stood there letting out my anger at my master, the girl I loved, there was nothing they could say for her

"We still care about you Issei!" Kiba shouted trying to defuse the situation. I felt a warm sensation down the side of my cheek; it was a tear I was crying… I then felt a sharp ripping sensation in my heart…. This feeling it was familiar…. All too familiar… one I felt before betrayal….

"SHUT UP!" I roared some of my power seeping into my voice giving it a deeper harsher tone

"I trusted you all of you!" my eyes trailing over every single one of them, Michael had a look of sympathy so did Azazel as did Serafall, Sirzechs, Irina, Asia, Xenovia, Gasper, Sona and Tsubaki while Rias, Akeno, Koneko and Kiba had looks of shame.

I then turned to Vali his expression was one of sympathy but I don't know it felt the most earnest in that moment I changed my fate,

"Vali… I am going to join the Khaos brigade" Everyone's eyes widened in horror

"Issei wait you are making a rash decision!" Sona shouted her stoic expression now gone replaced with one of shock and concern

"Issei! Calm down you are not thinking straight!" Sirzechs chimed in, Azazel and Michael had no words appropriate for the situation

"Ise-kun…" Rias tried to speak but i ignored her and turned to my rival

"Welcome to the Khaos Brigade" He said a tone of satisfaction accompanying his words

Suddenly I felt Sirzechs aura charge.

"I can't allow you Issei to join them…" he spoke a hardened expression

"Onii-sama wait!" Rias pleaded

Suddenly a man wielding a staff appeared beside Vali.

"Bikou why are you here…." Vali asked with confusion

"We need you to fight against the northern gods" the man known as Bikou spoke

"You are the descendent of Sun Wukong and the current monkey king aren't you?" Azazel spoke knowingly; the man turned to Azazel and nodded before speaking

"Indeed I am, sorry to arrive unattended" a cheeky grin laid in the aftermath of his remark

A large pulse of power was detected as Issei shouted in agony, everyone turned to him, on the floor were Rias's eight pawns covered in blood and parts of Issei's body tissue. Issei was panting while blood dribbled from his nose, mouth but blood poured out of his chest wound.

"I-I am n-no longer your servant Rias…" I said triumphantly as everyone stared on in shock, a half satisfied smile gracing my lips

"L-let's go Vali…" I said to my Rival who nodded

"He's coming as well?" Bikou spoke with shock to which Vali nodded and the monkey grinned

"Well this is going to be interesting…" Bikou spoke before he prepared to teleport

"Wait Issei!" Rias shouted as she ran after me but did not get more than five steps before I teleported the last words I said to her were

"Goodbye Rias"

WOW I LOVED WRITING THIS! I think it went well I hope you guys enjoyed it as well and I just realized something very true about Rias it can be summed up in the life referring to Raiser and her convince, in other words she does whatever is convenient for her whenever ignoring the consequences. Please review your thoughts! Until next time!