Protagonists, antagonists, and minor characters who are often victims.
Sure. There are victims, killers, and those who try to stop the killers.
The ones who face the horror (protagonists), the source of the horror (antagonists), and those caught in between (side characters).
Sure. There are supernatural horror, psychological horror, slasher horror, gothic horror, body horror, survival horror, monster - based horror, apocalyptic horror and haunted - object horror.
Sure. There are heroes, villains, magical creatures, and wizards.
There are main characters who lead the story, supporting characters that assist or oppose them, and background characters for authenticity.
Sure. There are heroes, villains, wizards, and sidekicks.
The types are: personal back story of characters (their memories, experiences), historical back story of the story's world (wars, important events in the past), and back story related to the main conflict (previous attempts to solve the problem, origin of the conflict).
Sure. There's tragic love like in 'Titanic'. There's also comical love, where the couple's relationship is full of funny situations. And the epic love, which often involves great deeds and sacrifices.
Protagonists are common. They are usually the ones who face the horror and try to survive. For example, in 'The Shining', Jack Torrance is a kind of protagonist who gradually succumbs to the horror of the haunted hotel. Then there are antagonists, like the ghosts, monsters or serial killers. In 'Friday the 13th', Jason Voorhees is the terrifying antagonist. There are also side characters who might be victims or those who add to the atmosphere, such as the caretaker in a spooky old mansion in many horror stories.
Sure. Protagonist is the lead. Antagonist opposes. Sidekick assists. Mentor guides. Love interest is for the emotional part. Trickster plays tricks. Foil contrasts. Damsel in distress needs help. Everyman is ordinary.
Sure. Protagonist is the main character. Antagonist is the one who causes problems for the protagonist. Supporting characters help the story along.
Some types are supernatural horror, real - life - inspired horror, and horror involving some sort of malevolent force.