Since I don't have access to this particular fanfic, it's hard to say for certain. However, in many fanfics, the main characters are often the ones that fans are most attached to from the source material. So, if it's a fanfic related to a famous book series, it would probably be the main protagonists and antagonists of that series, with the fanfic author exploring how love affects their interactions and development.
There's no way to know for sure without reading it. But generally, in a fanfic with the title 'love is all you need', the main characters could be anyone who has the potential for a significant love story. It could be a pair of star - crossed lovers, or a group of characters who together form a complex web of love relationships, whether they are positive or full of conflict.
I'm not sure specifically as I haven't read it. But it could be the main characters from the original work on which the fanfic is based. For example, if it's a fanfic of a TV show about a group of friends, the main characters would likely be those friends, and the fanfic would explore their love relationships in new ways.
There's no way to accurately determine who the main characters are without reading the 'love is all you need 2016 fanfiction'. They could be a young couple trying to find their way in a world full of challenges in 2016. Or perhaps it could be a group of friends where one of them is searching for true love during that year. It could also be a story about a family and how their love for each other endures in 2016.
I'm not sure as I haven't read the novel specifically. But typically, in a novel with such a title, there might be a protagonist who is searching for love or learning about its true meaning. There could also be a love interest, and perhaps some supporting characters like friends or family members who influence the main character's journey regarding love.
Without having read the 'love is all you need novel', it's difficult to name the specific main characters. But in a novel with such a title, we might expect to find a central character who is perhaps cynical about love at the start. Then there could be another character who comes into their life and changes their perspective on love. There might also be side characters like a wise old person who gives advice on love or a group of friends who support the main character's exploration of love.
Maybe there is a group of characters where one stands out as the most important in relation to the'sister' concept. They might have distinct personalities, like one being very kind and nurturing, while another could be more rebellious but still deeply connected to the idea of sisterhood within the context of the fanfic.
In the 'All You Need Is Kill' novel, the main character is Keiji Kiriya. He's a complex character who starts as a relatively inexperienced soldier but gradually becomes a battle - hardened and strategic thinker due to his repeated experiences in the time loop. There are also other supporting characters like Rita Vrataski who play important roles in the story's development.
I'm not sure specifically as I haven't read it in detail, but it's likely that there are characters who are sisters, and perhaps other family members or friends who interact with them.
It could be about various things. Maybe it's a fanfic that explores different kinds of love, such as romantic love between characters from a particular fandom. It might also delve into the idea that love is the most important element in a story, whether it's love among friends, family, or lovers within the context of the fan - created world.
I'm not entirely sure without reading it in detail, but likely the sister is one of the main characters. And there's probably a male protagonist who has a special relationship with the sister.
I'm not sure as I haven't read it. But in Beast Wars, typical main characters could be Optimus Primal or Megatron. In this fanfic, it might be versions of them or other characters with a love story arc.
Often in a novel titled 'All for Love', there would be at least one character who is the protagonist in the love story. There could also be secondary characters like friends or family members who either support or oppose the relationship. For instance, a best friend who gives advice to the main character in love or a family member who tries to break the relationship due to some family interests.