If 'tithi' and 'yu' have some distinct traits, for example, if tithi has a very unusual power and yu has a complex personality, how these elements are explored in the fanfic can make it unique. Also, the writing style of the author can add a special touch. Maybe the author uses a lot of vivid descriptions or a unique narrative structure in the 'tithi x yu' fanficfanfic.
One factor that could make 'tithi x yu fanficfanfic' unique is the world - building. If the story is set in a very different or unique universe, and how tithi and yu fit into that world, adapt to it, and change it through their actions can be really interesting. Additionally, the themes explored in the fanfic, like friendship, love, or self - discovery in the context of tithi and yu's relationship, can also make it stand out from other fanfics.
The uniqueness of 'tithi x yu fanficfanfic' could lie in the specific relationship between tithi and yu. If they are original characters, their backstories and how they interact might be what sets the fanfic apart.