Losers' Club, and not just because she's the sole female in the group. While all the Losers are menaced by Pennywise and IT's other various forms, as well as sadistic bully Henry Bowers, Beverly has to deal with another threat that resides in her own home.
Beverly's father Alvin Marsh is an absolutely loathsome man in all versions of IT, but the 2017 movie takes things a step further by making him explicitly sexually abusive to his daughter. Even if IT didn't exist, Bev would still have to contend with her bastard of a father, and that's what makes it all the more sad to see that she ended up marrying a violent man just like him. Unfortunately, that's truth in fiction, as a lot of childhood abuse victims end up gravitating toward another ab as adults.
Tom Rogan makes a memorable but brief appearance in both the 1990 IT miniseries and 2019's IT Chapter Two movie. In Stephen King's book though, he gets a lot more to do, as he's not willing to let Beverly go.
IT: The Beverly Marsh Book Subplot Left Out of Both Movies
In the 1990 IT miniseries, Tom Rogan (played by Ryan Michael) attempts to continue abusing Beverly, she fights back and escapes, and Tom is gone from the story completely. In IT Chapter Two, almost the exact same thing happens, with Tom now played by Will Beinbrink. In Stephen King's novel, Tom doesn't just give up after Bev leaves him. Instead, he goes to one of her friends, and beats her until she its that his wife went to Derry. He then follows her there, intending to kill her, and possibly Bill Denborough, who she had called an old friend and Tom assumes she's sleeping with.
Tom's plans go awry once he gets to Derry though, as he encounters IT, who puts him under ITs control. IT uses Tom to abduct Bill's wife Audra, who followed Bill to Derry in both King's book and the miniseries, and take her back to ITs lair. Once there, Tom is shown the Deadlights, and needless to say, his reaction isn't good, dropping dead on the spot. IT then eats him, because really, why let a good meal go to waste? While it's satisfying to read Tom get his, it's not hard to see why this subplot was removed from both screen adaptations of IT. It's kind of its own thing, and considering both adaptations are already very long, probably would've felt superfluous.
