I think it might be the protagonist's closest ally, who has been secretly jealous and plotting revenge all along. But that's just a guess based on common tropes in such stories.
It's hard to say. Maybe it's the mysterious character who always shows up at odd times.
The mother is also a possibility. She might be suffering from some sort of mental illness that has been hidden from the family for a long time. And under certain stressors, she snaps and becomes the killer. Or perhaps she has a hidden motive related to protecting the family in a twisted way.
The killer could be the local shopkeeper. He had a grudge against the victim because the victim was spreading rumors about his store not having good Christmas deals. So, he planned the murder during the Christmas shopping season.
Yes, it is. The Dating Game Killer was a real person and the events associated with him are based on actual occurrences.
Well, in these kinds of stories, the victims are often people who are not fully aware of their surroundings. For instance, tourists who are new to an area and don't know about the local legends or dangers. Workers who have to stay late at an old factory or office building might also be targeted. And sometimes, it could be a group of friends who are looking for a thrill and end up in a place where the killer lurks. These victims usually don't take the necessary precautions, and that makes them easy prey for the killer.
It could be two students from different majors. One might be a studious and quiet type, while the other is more outgoing. The 'killer' aspect could be an external factor like a strict professor who is against their relationship and tries to'sabotage' it, acting like a relationship 'killer'.
Perhaps it was a jealous rival. If there was a love triangle, the person who felt they were losing out might have planned the murder. They could have seen Valentine's Day as the perfect time to get rid of the competition when everyone's emotions are high.
Since we don't have enough information about this '1 5 killer', I can't say who the killer was exactly.
In the Amityville Horror Killer Story, the killer was Ronald DeFeo Jr. He killed his entire family in the house in Amityville.
Even a new character created specifically for the fanfiction could be the serial killer. This character could be someone with a grudge against Beacon Academy, for instance. They might be killing students or professors in a way that ties into some dark secret or vendetta they have against the institution.
It's a horror-themed game where players try to survive a killer's attacks. The story involves a mysterious and terrifying antagonist.