One challenge could be cultural differences. Naruto is from the ninja world with its own set of values and traditions, while Yasaka is from the youkai world. Another might be the acceptance of their relationship by their respective communities. The ninja might be suspicious of a youkai, and the youkai might not fully trust a human like Naruto at first.
Issei is often paired with Yasaka. Since he is a central character in Highschool DxD, many fanfiction writers like to create scenarios where he and Yasaka interact, sometimes romantically. Another character is Vali. His power and his own story arc make him an interesting counterpart to Yasaka in fanfiction.
Definitely! The Hajime no Ippo manga has a compelling plot with lots of exciting boxing matches and emotional character arcs. The way it portrays the sport and the growth of the main character makes it really enjoyable.
At the end of the novel, Hajime has extremely high stats in various aspects. His strength stat is off the charts, allowing him to overpower most enemies with ease. His magic power has also grown exponentially, enabling him to cast powerful spells. His agility and speed make him a formidable opponent in combat, as he can dodge attacks swiftly. Additionally, his intelligence has developed, helping him in strategic planning during battles and in creating new and powerful items.
There could be. Fanfic writers often come up with various pairings, and 'naruto x yasaka' is not an uncommon type of crossover idea. However, it may not be as mainstream as some other pairings in the Naruto fandom. To find it, you might also want to check Naruto - specific fanfic communities where fans share and discuss their works.
I'm not aware of any such fanfic. Fanfics should abide by ethical and moral standards, and this description involves inappropriate and unethical behavior. Naruto is a popular anime character, and most fanfics focus on positive storylines like friendship, adventure, and character growth.