Based on the title, clearly 'he' is a central character as his love interests are the focus. 'Her' is the object of his love, and'me' is the one left out, so all three are likely to be main characters in different ways. 'He' drives the plot with his choice of 'her' over'me', and 'her' and'me' are important in relation to how 'he' feels.
Without having read the book, it's difficult to determine the exact main characters. But it's likely that there will be at least two main characters involved in the love relationship. There could be a character who is hesitant about love and another who is trying to make the relationship work. There might also be side characters such as a wise old person who gives advice on love, or a rival who adds tension to the relationship.
Since I don't know the exact novel, I can't say for sure. But usually, there would be a central character around whom the 'hate or love' dynamic revolves.
I'm not sure as I haven't read the specific 'love me or reject me novel'. But usually, there would be a protagonist who is likely to be the one in the situation of waiting for love or rejection. There might also be a love interest character.
I don't know for sure since I'm not familiar with this particular novel. But it could be a young protagonist, perhaps a girl or a boy, who is at the center of the love - hate dynamic.
Since I haven't read it, I can't say for sure. But it might have a protagonist who is on the receiving end of the love - leave cycle and perhaps a love interest who is causing this situation.
There might be a protagonist who is a bit of an outcast or misunderstood. And then there could be a character who is initially opposed to the protagonist but later develops complex feelings. It could also include some side characters who either fuel the hate or love between the main characters, like a jealous ex - partner or a helpful friend.
Since I don't know the specific 'love me hate me novel', I can't say for sure. But it could have a protagonist who is the center of the love - hate relationships, and perhaps a love interest who has a complex relationship with the protagonist.
Since I haven't actually read the 'Hate Me Love Me' novel, I can only speculate. There might be a central figure who is either very misunderstood or has a very unique way of interacting with others. This could lead to some characters hating them for their actions or words, while others are drawn to them, perhaps seeing a deeper side that others miss.
I don't know as I haven't read the novel.
I'm not sure specifically as I haven't played it. But usually in a love - themed visual novel, there would be a male and a female lead.