Maybe some new character created specifically for a sad love story. A girl or guy who enters Sasuke's life at a time when he is at his most conflicted. They fall in love, but Sasuke's past and his destiny tear them apart. For instance, if this new character is a pacifist and Sasuke is still on his revenge - filled path, their values clash and the love is doomed.
Another possibility is Ino. Although she doesn't have as deep a connection with Sasuke as Sakura in the original story, in a different take, she could be the love interest in a sad Sasuke love story. Her own strong personality and Sasuke's aloofness could lead to a lot of misunderstandings and heartbreak.
It could be Sakura. She has long - time feelings for Sasuke, but Sasuke's coldness and his own journey often make their relationship full of sorrow.
Another possibility is that Hinata could be his love interest in an alternate version of the story. She is a kind - hearted and strong - willed character, and her gentle nature might be what attracts Sasuke in this 'love story'.
It could be a strong - willed artist. She could be painting in a park when Sasuke passes by and is immediately drawn to her creativity and free spirit.
There's also a possibility that it's a healer in his village. She might have been the one to patch him up after battles. Over time, she gets to know the real Deidara behind the tough ninja exterior. Her gentle nature could contrast with his more brash and explosive personality, and this contrast could be what draws them together in a love story.
It could be a kind - hearted Who girl. She might be the one who is always helping others and she sees the good in the Grinch even when no one else does.
Another option could be a female ninja from another village. Their relationship could start as a result of some diplomatic or mission - related interactions. For example, she might initially be an enemy but then discovers Kakashi's true self and they develop feelings for each other.
There is a possibility that his love interest could be a mermaid. In the world of pirates, mermaids are often a part of the lore. A mermaid who saves Zoro from drowning or some other danger, and then they fall in love, would make for an exciting love story.
A demigod from a different pantheon could also be his love interest. For example, a Norse demigod who comes to Camp Half - Blood on some sort of exchange. Leo and she would have to overcome cultural differences as well as the normal relationship hurdles, but their love could be a powerful force that unites two different worlds of demigods.
Perhaps a character from a different social class who challenges Enola's views and in the process, they fall in love. It could be someone who is initially her opponent in some way, like a person with different ideas about how to solve a case, but then they see the value in each other and feelings emerge.
It could be a character who was once Orochimaru's student or apprentice. There could be a complex relationship that develops over time, starting from a mentor - student dynamic and evolving into something more. For example, Kabuto, who was deeply influenced by Orochimaru, could potentially be part of a love - hate relationship that could be considered a form of love story in a very convoluted way.
A fairy could be a likely love interest. In the 'Artemis Fowl' universe, fairies are a major part of the story. A female fairy with her own magical abilities and a strong personality might catch Artemis's eye.