Yes, in the Five Nights at Freddy's series, it is heavily implied that William Afton, also known as the Purple Guy, built the animatronics with the intention of using them to kill and harm others. Afton is depicted as a sinister and malevolent character who uses the animatronics to carry out his dark deeds, and his actions are a central part of the game's lore and storyline. The animatronics are programmed to hunt and attack humans, and Afton is shown to have a hand in their creation and manipulation for his own twisted purposes. **

The animatronics attack the player in Five Nights at Freddy's because they have been programmed to perceive the player as a threat. In the game's lore, the animatronics are possessed by the spirits of children who were killed at the pizzeria, and they seek revenge on anyone they perceive as a danger to them. Additionally, the animatronics may also be acting out of a sense of self-preservation, as they have been programmed to protect the pizzeria and its secrets. This creates a sense of tension and fear for the player as they try to survive the night while being hunted by the animatronics. **

The profession where one builds animatronics is typically known as an animatronics engineer or designer. These professionals are skilled in combining elements of robotics, electronics, and artistry to create lifelike and interactive characters. They work in various industries such as theme parks, film and television production, museums, and advertising to bring characters to life through movement and sound. Animatronics engineers often have a background in engineering, mechanical design, or special effects to excel in this field. **

The profession that involves building animatronics is known as animatronics engineering. Animatronics engineers design, create, and maintain robotic devices that are used to mimic human or animal movements. These devices are commonly used in theme parks, movies, and other forms of entertainment to bring characters to life through realistic movements and interactions. Animatronics engineers require a combination of skills in robotics, mechanics, electronics, and programming to bring their creations to life. **

The profession in which one builds animatronics is typically known as an animatronics engineer or designer. These professionals are skilled in creating mechanical and electronic systems that control the movement and behavior of animatronic characters. They often work in industries such as theme parks, film and television production, museums, and interactive exhibits, bringing life to inanimate objects through their technical expertise and creativity. **

In Night 5 of FNAF 4, the animatronics that appear are Nightmare Fredbear and Nightmare. These two animatronics are the main antagonists that the player must avoid and survive against throughout the night. They are more aggressive and challenging compared to the previous nights, making Night 5 one of the most difficult levels in the game. **

The true names of the animatronics in Five Nights at Freddy's are Freddy Fazbear, Bonnie the Bunny, Chica the Chicken, Foxy the Pirate Fox, and Golden Freddy. These are the original animatronics from the first game in the series. There are also additional animatronics in later games, such as Toy Freddy, Toy Bonnie, Toy Chica, Mangle, Balloon Boy, and others, but the original five are the most well-known. **

In the lore of Five Nights at Freddy's, it is suggested that the animatronics mistake the night guard for an endoskeleton due to their programming to seek out and stuff any endoskeletons they encounter into a spare Freddy Fazbear suit. This is why they are aggressive towards the night guard and attempt to attack them. However, it is also implied that there may be other reasons for their behavior, such as the influence of the vengeful spirits of children haunting the animatronics. The exact nature of the animatronics' motivations is left ambiguous in the game's lore. **