Multiverse Sonic DXD

Chapter 4:Darkness falls as new godly Dragon emperor raises.

It been ten days and Thanks to Sonic, Rias and her peerage has increased in strength and Koneko learned many of Sonic attacks like his kamehameha, Kaioken and instant transmission, Issei even got a power boost as when he and Sonic were sparing Sonic dark form and Issei Boosted gear clashed Sonic dark form weakened and Boosted gear was increased but Issei felt his boosted gear acting weird it was the night before the match and Sonic was sitting on a beach looking at the stars "hi Sonic" he turned to see Rias as he smile "hi Rias couldn't sleep either?" he questioned as she smiled and sat down next to him "yeah, what keeps you awake?" She asked "well you Koneko see me as a big brother? (Rias nods) Well I worried about what I did to my brother but I mean like in a fit of rage and....I don't want that. Koneko is an amazing little sister and I can lose another family member" he said while gripping his fist in fear but Rias grabbed his hand and held it gently "don't worry, I know you won't. Your dark form as gotten weaker and weaker meaning you have more control over what pisses you off and Koneko and I can see it so if anything if you do let your dark form take over me and Koneko and can easily snap you out of it" Rias reassured him "thanks Rias and don't worry your gonna win tomorrow" Sonic told as she blushed and smile but then got serious "Sonic have made your decision?" she asked as he was confused "about joining my peerage?" she added as he then understood "oh sorry Rias that's taking me so long but-" "don't become a part of my peerage" she told him which shocked Sonic "what do you not want me on your peerage?" Sonic asked "I do but if Riser wins then you have to be his under his control too so please if we win then you can join but Riser wins tomorrow then crush the pawn precise as you have made your choice yet and since your not a devil you won't be target so please promise me if Riser wins you crush the pawn piece and run cause I know he will make your life a living hell, so please promise me" Rias requested "I promise" Sonic said as she smile and stood "thank you, well I'm heading to bed night" she said "Night Rias" Sonic replied before Rias walked back in and Sonic went to the roof to sleep.

However the next day even with Rias and her peerage with their powerboost went against Riser Peerage while the improvements did help stake the odds in their favour but in the end Rias gave up which pissed and she was forced to marry Riser, later that night Sonic was outside punching a tree and blaming himself "it's my fault if I joined Rias Peerage then they would have won, Rias I am so sorry" Sonic said as he sat down while gripping his fist in frustration "would like a chance to save her?" he looked up to see grayfia, which confused him "what do you mean?" Sonic asked "Rias brother, Sirzechs was impressed about Rias rise in power and I told him that you help train her team and I also told him about your Dark form and how you made Riser look like a weakening so he want to offer you a chance to save Rias" she explained as Sonic stood straight up and got serious "all you have to do is go into the underworld and beat him and he gave me a scroll which take you there but it only works on devils so-" she stopped as she saw Sonic take out the pawn piece and force himself into Rias Peerage as he now a devil as he had demons wing then a angel wing as well which shocked both of them before Sonic realised about his god form giving him an angel wing but it came with aside effect Sonic new devil power and his god form was like oil and water so they clashed against each other and it was causing Sonic immense pain as he fell to all fours "are okay?" Grayfia asked "yeah, i'm fine (grunts as he forced himself to stand up) the scroll now!" He told her as he groaned in pain but when she brought the scroll out Sonic grabbed it and instantly teleported at first she was confused until she realised angels and demons do not mix. She realised that Sonic body was complete agony "you do not pass out, Rias needs you" she mumbled.

(at the wedding)

At the wedding high class devils along with Rias and Riser Peerage while Issei fought Riser but even giving his arm up for Ddraig to unlock balance breaker he wasn't enough to beat Riser "so who else what's to challenge the great Riser as I am immortal!" Riser declared as no one did not say anything "well let's get to Riser wedding" Riser said he walked to Rias in her dress.