Billy Loomis and Stu Macher || HORRORTHON!

Stuart "Stu" Macher is Billy Loomis's accomplice, as well as an insensitive and eccentric best friend. A horror movie fanatic, he went along with Billy's slasher film-like murder spree, the late-September 1996 Woodsboro Murders. He was completely unaware of Billy's true motive to kill Maureen Prescott, and simply had no real motive for doing it other than for fun. Sidney Prescott later asked what his motive was, and he simply said, "Peer pressure. I'm far too sensitive". She later electrocuted Stu, which he survived despite the fact he was dying of blood loss from both Billy's stabbing and Sidney's attack.

Stu was also the boyfriend of Tatum Riley, ex-boyfriend of Casey Becker and younger brother of Leslie Macher and at least one other possible younger sister or niece.

Stuart Macher was born sometime in late 1979. He grew up in 261 Turner Lane, Woodsboro, California, a large farmhouse with his sibling(s) and parents. He has at least one elder sister, Leslie. From his house, it appears he either has a younger sister as well, or a niece through Leslie.

As a Woodsboro High senior, he is the fun-loving boyfriend of Tatum Riley briefly. Previously, he dated Casey Becker until she dumped him for Steven Orth, a football player.

In the fall of 1995, an LA-native, Roman Bridger made home-made films, stalking his rejecting birth mother, Maureen Prescott and documenting her affairs. including one she had with his friend, Billy Loomis' father, Hank Loomis. Billy was sent into blind rage. Roman suggested Billy have an accomplice "to sell out in case he got caught", which became his friend, Stu.

On one Thursday night in late-September 1995, the pair secretly invaded Sidney Prescott's house, 34 Elm Street. After Maureen had seduced Cotton Weary, who left inebriated without his coat, they made their move. Both teenagers, around 16 or 17, stabbed the 45-year-old housewife to death.

Billy then left, wearing Cotton's coat. With matching hairstyles at the time, Sidney states that she saw Cotton leave wearing it. Then, Billy (or Stu) planted it in his car, framing him. Within the following year, Billy and Stu had successfully gotten away with murder. During this timeframe, it inspired confidence in them to continue on and create their own killing spree, inspired by their favorite horror movies. During this timeframe or possibly one year earlier, Stu's girlfriend, Casey Becker dumps him. She then initiates a relationship with Steven Orth. In the embarrassment and shame, he pursues Tatum Riley. He lies to Tatum, telling her he dumped his ex-girlfriend, Casey, rather than the other way around. Stu only dated Tatum to be in proximity to Sidney Prescott, the next ultimate revenge target. Despite this, they would have been in each other's circles regardless, for at least two years.

As a horror film fanatic, Billy pressures his best friend, Stu Macher, into helping him commit a killing spree in Woodsboro. While he states it is "scarier when there is no motive", he reveals to Sidney, and Stu, that the killing spree is an elaborate revenge attack against Maureen Prescott. Billy's anger stems from his mother's abandonment, following his father's affair with Maureen, his girlfriend's mother. He blames Maureen and her well-renowned promiscuity for ruining his family structure. In revenge, he kills Maureen, and successfully frames her other lover, Cotton. One year later, he tortures his grieving girlfriend, Sidney, in an elaborate revenge plot, hoping to frame her father for the killing spree he commits with Stu, following their success with framing Cotton. However, Billy fails this time around, as Sidney ultimately defeats and nearly kills the psychotic pairing inside Stu's house. Billy was born to Hank and Nancy Loomis and at some point, started dating Sidney Prescott as well as befriending Stu Macher. Hank had an affair with Sidney's mother, Maureen, and upon discovering this, Billy's mother left. The maternal abandonment caused a serious disruption to Billy's life. After learning about the affair, Roman Bridger showed Billy video footage of Hank having an affair with Maureen, his girlfriend's mother. Roman convinced Billy to murder Maureen because she was the reason Mrs. Loomis left Hank and Billy. Roman told Billy to get an easily controllable accomplice he could pin the murder on if it went wrong and to frame another of Maureen's lovers. Billy and Stu followed the plan perfectly.

At some point, Stu and Billy developed an actual connection beyond Billy's intentions. The two are quite close and developed mutual romantic attraction for one-another, eventually becoming lovers whilst still claiming to be best friends to avoid homophobia. Despite Billy occasionally being more harsh on Stu, it is a relatively healthy, dedicated relationship. Stu is generally more submissive, having traits such as being somewhat whiny and teasing. Stu is also very emotional and sensitive, somewhat "fragile". Billy, however, is more on the dominant side, having more serious, intimidating traits. Despite not wearing his heart on his sleeve like Stu does, Billy will often show little annoyance over Stu's whining or emotional episodes. Even comforting Stu, something that seems unusual for Billy.

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