One interesting concept could be summoning servants from different time periods and seeing how they interact with the DxD universe. For example, a servant from ancient Greece might have a unique perspective on the devils and angels in DxD. Another concept could be a servant with special powers that are not typically seen in the original series, like a servant who can manipulate time in a different way than what's shown in DxD. Also, the idea of a servant having a secret mission that ties into the overarching plot of DxD could make for an engaging fanfiction.
A great concept in Holy Grail DxD servant - summoning fanfiction is when a servant is summoned with a connection to one of the main characters' past. It could be a servant who knew their ancestor or was involved in an event that shaped the character's family history. This connection can add a layer of depth to the story, as the character has to deal with this newfound link through the summoned servant. It can also bring out hidden aspects of the character's personality and abilities as they interact with the servant.
If you want the clearest chapter reference, go to Chapter 118. Early on, At 8 in the morning, several guests appeared on time next to the...; later, the chapter leans on Seeing the five individuals walking together in unison, Director Sun was....
A practical answer is Chapter 147, because it turns the idea into a concrete scene. The chapter opens with Xiao Xueyi nodded in agreement after listening., adds pressure through She even took the initiative to call?, and ends on Only Jiang Li glanced back at Director Sun, and then took out her.
If you want the clearest chapter reference, go to Chapter 173. Early on, Jiang Li finally rose from her seat.; later, the chapter leans on Seeing her stand up, He Yun also stood up..
Chapter 152 is the strongest chapter-level answer because it starts from While most of the villagers of Chixia Village were gathered at the village... and follows through on That shouldn't be." Zhao Lang's eye color darkened, "I'm afraid he's....
A practical answer is Chapter 130, because it turns the idea into a concrete scene. The chapter opens with This task, the first one, should have been his in the bag., adds pressure through Not to mention Wen Jiaojiao, who was still lying in the hospital on an IV..., and ends on Normally, the best.
If you want the clearest chapter reference, go to Chapter 138. Early on, Is there such a good deal?; later, the chapter leans on Qi Tianyu quickly nodded in agreement and knelt down to start helping....
The best chapter pointer here is Chapter 100, "Ominous, there might be a bloody disaster!". It opens with The barrage was about to die of laughter. and closes on Her eyes flickered slightly as she grabbed the hand..
If you want the clearest chapter reference, go to Chapter 122. Early on, Damn, are we supposed to find the points card in the mud?!" He had just...; later, the chapter leans on To salvage his image, he had deliberately dressed up before leaving the....
If you want the clearest chapter reference, go to Chapter 154. Early on, Hahaha, I'm dying of laughter, Lili, do you really have to be so blunt?"...; later, the chapter leans on His expression is killing me!!!" "Help, she's making a scene, he's....
Look to Chapter 152 for the clearest answer. It begins with While most of the villagers of Chixia Village were gathered at the village..., keeps building through The unassuming structure stood out oddly against the backdrop of its..., and lands on That shouldn't be." Zhao Lang's eye color.