Our very first Monster of the Week is called the Dimensional Bug Mother. We see her sticking her grotesque tendrils into people — including kids — and sucking them up to provide that energy for her unhatched spawn. What's worse is that despite being destroyed, she detached her egg sac prior as she fulfilled her mission as a parent. This allows the Vyram to create new Dimensional Beasts, each a chilling reminder that a human died for them to exist.
Faucet Dimension strangles people with its faucet hose, sucks them up... and releases their blood from the nozzle. No guesses as to what happened to them. It doesn't help that when it's created, Tran is laughing like a child enjoying a fun game.
Road Dimension causes a destructive highway cataclysm by curling up a bridge during rush hour, sending hundreds of cars flying! A lot of people are not walking away from it, it's obvious.
House Dimension. It's first appearance is the wall of some poor woman's house turning into a fleshy wall of knashing teeth! And those mouths serve to messily devour anyone unlucky enough to be in the same room. Ryu manages to survive being swallowed by one such mouth, only to run into Radiguet... and that's a great deal of nightmare as well, given what kind of monster he is.
Bus Dimension traps people inside of it and consumes them, leaving liquefied remains in its wake.
Ako's Pooh-tan. A Teddy-bear that became the core of a Monster of the Week: Gomi Dimension. Initially, due to his memories of Ako, he is a friendly monster who can make old, rusty items into brand new (as well as eat trash, which helps with saving space in garbage dumps)...But he gets attacked by a mob for being different and then, just as things are looking up for him with a home and job at the dump, nearly gets killed by a pair of retailers he drove off for dumping perfectly good merchandise they couldn't sell off. The result is he turns The Dark Side and goes on a Roaring Rampage of Revenge, now using his power in reverse to corrode everything his beam hits...which includes rotting humans into skeletons! So this is where Barragan Luisenbarn gets inspiration for his power...
Empress Juza fires a laser at people that causes crystals to grow out of them, which even with the shows limited effects still looks extremely gruesome. For extra fuel, the crystals eventually end up consuming the person - and it draws out the pain and despair the people it grows out from to fuel Semimaru's birth & growth.
When Semimaru hatches and gradually grows to giant size in episode 23, there are some freaky-ass looking manga-style illustrations displayed by way of Freeze-Frame Bonus (literally — the drawings only appear during certain frames) that appear to depict Semimaru going from worm to monster, ending with a Gross-Up Close-Up of what's presumably supposed to be Semimaru's face, with fartoo much teeth for comfort. Pleasant dreams...
The Majin from Episode 33 that turn people into PINEAPPLES and eat them.
Tranza's Humongous Mecha, Majin Robo Veronica, uses people as its fuel pack.
Just in general, most Vyram schemes are straight-up scary. Anyone from the Reverse Dimension — most likely Dimensional Beasts — can and will most likely be the cause of a horrifying, untimely demise to any unfortunate human within close proximity of it.
Probably the best example is none other than Radiguet, the Big Bad himself. He starts out as one of the 4 main villains, but as the series progresses, he shows he truly is the most wicked and depraved of them all. Showing no care and no compassion for anyone, he even turns on a girl that had cared for him while amnesiac, which he made sure to kill just to reject any chance of him becoming good. Not to mention his rather disturbing advances on Maria, coupled with a desire to have her all for himself once he has taken over the Vyram leadership. And that's not even getting into the fact that he was the one who brainwashed her in the first place, and that he ends up killing her when she remembers her true identity. Radiguet cemented his position as one of Super Sentai's biggest monsters with this and more.
Which makes it rather disturbing for a villain who's actually human looking, the latter fact even makes it possible for see to see his Slasher Smile and disturbing faces anytime he is feeling pleasure from a kill or the suffering of others.
As satisfying as it is, Radiguet's torture of the already badly defeated Tranza, stabbing his hand, twisting the blade in, and then stomping on his shoulder, all the while turning the latter's Say My Name moment back at him, is still a bit fucked up to watch. Worse is when he, like Juza did before him, sentences him to a Fate Worse than Death by forcing Tranza to live among the humans. Except, at least Juza took away Radiguet's memories, which let him live peacefully and happy (until he got his memories back). Radiguet doesn't even afford that mercy and luxury, and just basically leaves Tranza to rot as a bandaged, drooling, and screaming vegetable in a mental hospital. The last shot is rather disturbing, Tranza being wheeled away further into the asylum, and right as the bars close behind him, he begins flailing and screaming, two wards trying to help restrain him, as the screen whites out and his screams fade into an echo. Brrrr...
Episode 36's monster has the ability to give humans an uncontrollable appetite. While this sounds like a more comedic monster power, the show plays it for horror instead, including a scene in which a mother is implied to have eaten her little girl's dog.
There's something absolutely fucked up about the scene of Tran forcing himself to grow into Tranza out of sheer indignant rage. While there are some Narmy elements, such as the otherwise-questionable-looking close ups of bulges growing under his bodysuit meant to look like his muscles growing, it doesn't fully diminish the scene of him tensing and straining and contorting his face until he lets out a blood-curdling scream of fury and hate that should never come out of a kid's mouth (props to Miku Kuga for going all out in his final on-screen moment). And while it's done for obvious PG reasons, him tossing his cloak aside and all you see is the instantaneous growth from a boy's body into an adult one is through a silhouette on the cave wall is its own kind of creepy. And while looking at Yutaka Hirose's naked body (from the abs up, of course) can be appealing, it still doesn't take away how wrong the whole thing felt. The close-ups of his eyes punctuate the fact this grown-up Tran is going to be someone to be very feared by both the Jetmen and his fellow Vyram.
Maria's schtick as a vampire is terrifying. What's worse is that when she lures Ryu by pretending to be Rie and infects him with the vampiric parasite that Radiguet implanted onto her (against her own will, at that), the entire scene of him restrained in a cage and losing control is horrifying.
