In Highschool DxD, what makes Rias and Issei's relationship unique?

Their relationship could be developed uniquely by having them swap bodies for a while. This would force them to see things from each other's perspective. Issei would understand the pressures Rias faces as a devil princess, and Rias would get a taste of Issei's more carefree but determined human side.

One great fanfiction idea could be that Issei discovers a new power within himself that is directly linked to Rias's heritage. Maybe he can tap into an ancient magic that only works in harmony with Rias's own powers. As they train together to master this new ability, their relationship deepens beyond just the typical master - servant bond in the Highschool DxD world.

A great storyline could also be about their friendship evolving into a deeper emotional connection. They share many experiences, both good and bad. Rias sees Issei's potential not just as a powerful piece in her peerage, but as a person. Issei, on the other hand, respects Rias's leadership and comes to understand her better over time. This connection can be explored through different arcs in the story where they rely on each other more than just as comrades.

The main reason is the chemistry between Rias and Issei in the original series. Fans love to explore their relationship further in fanfics. It gives them a chance to see different scenarios and what - ifs.

In these fanfictions, the lightning aspect often ties into Issei's personal growth. It's not just about having cool powers. It's about how he matures as a person while dealing with the newfound powers. This makes the stories more than just action - packed tales; they become character - driven narratives. For instance, in some fanfics, he has to overcome his fear of the power going out of control, which is a great way to show his development.

The unique aspect could be the portrayal of Issei in a 'cold' state. Usually, Issei is known for his pervy and outgoing nature. In 'cold' fanfictions, he might be more reserved or have a different personality, which can offer a fresh perspective on the character and the story.

It's unique because it can give a new perspective on his relationships. For example, his relationship with his harem. Instead of relying on his charm and words, he has to rely on his actions and expressions more. This can create more heartfelt and deeper connections with the other characters in the fanfiction.

The relationship between Issei and Rias would evolve in a beautiful way. They would be each other's support system. Issei, who has always been passionate, would become more refined in his love for Rias. Rias, on the other hand, would become more lenient towards Issei's sometimes - rash decisions. They would have a relationship based on mutual understanding, respect and love. Their engagement would be the starting point of a long and fulfilling journey together, filled with love, laughter and some tears as they face the challenges of their world.

There's a fanfic called 'Rias and Issei: A New Adventure'. In this one, they go on a journey together that tests their relationship. The author does a wonderful job of portraying their feelings for each other and the challenges they face as a couple in the world of Highschool DxD.

A popular fanfiction is 'Issei and Rias: United Front'. It portrays them as a powerful duo against their enemies. The author does an amazing job of writing their interactions, making it seem very natural. The story also has some great plot twists that keep readers engaged. You can find these fanfictions on various fanfiction websites. Just search for 'Highschool DxD Issei x Rias fanfiction' and you'll get a whole list to choose from.