Captain SNES: The Game Masta: Lucca tells Chrono that modifying the Epoch to be able to traverse interdimensional boundaries was too risky (even for her) and nothing he can say will change her mind. Chronosays nothing, and changes her mind.
Codename Hunter: Never, ever try to imply that either Hunter or Gyspy (especially due to her parents' past) are slaves just 'cause they use bands, or Hunter will shut you up with a look.
Miranda Deegan, a powerful archmage, has what is called "the Evil Eye". It can hit from up to fifteen yards away and works around corners! Even strong men quail at its influence. Even more bone-chillingly scarier, she can do it from another dimension◊, as her son and Luna found out...
Ears for Elves: Lady Trylia has an expression when she doesn't get what she wants that causes withdrawn Kanryl to speak since her glare was frightening his animals.
Friendship is Dragons: A Campaign Comic based off of My Little Pony: Friendship Is Magic, Fluttershy's stare (see below) is not just an ability of the character, but of her player, and frightened the DM into submission when a dragon was menacing her party. When it was mentioned that she just thought about what her mother would do, The DM speculates that the ability is probably genetic.
Jean is better at it. Not that it gets through to Bob, either.
Irregular Webcomic!: The Head Death does this to the Death of Insanely Overpowered Fireballs (currently in the position of "Living for Over 900 Years"). Due to the lack of eyeballs, Fireballs couldn't tell.
Roark "Rocky" Rickaby has hypothesized that the loss of Viktor's right eye has caused the hate energy he generates to become focused into an extremely powerful GLARE BEAM.
And apparently, Ivy's been taking lessons as can be seen in the very last panel. As the next page shows, you see that look on her face, run. Run very fast.
Gary manages to provoke simultaneous comedy death glares from two women here. Which is kind of a sad waste, given that one slightly harsh word is usually enough to make Gary crawl away weeping.
One is also inflicted by Sonya on new character Peggy here, despite the fact that Sonya was proudly doing Peggy a favour at the time. Sonya's not too bright, but she's passionate and good at showing how she feels about things.
morphE: Amical is a kind and sweet host who talks sugary sweet even when threatening people's lives. At the end of Chapter 1, he gives a near shocking turn to the seedlings (and viewer) with a glare, reminding that he will always be watching.
Niels: Agent 300 gives a frightening one to Niels before launching into a Roaring Rampage of Revenge after Niels shot Agent 250 in the stomach.
Jardin receives hostile glares from Stillstorm and at least one of the other deck officers while on Tempest's bridge, making the distrust and resentment toward his presence almost palpable at times.
Tempo allowing Jardin to remain onTempest's bridge to observe the eventual destruction of Bellarmine's wreckage earns her a nasty glare from Stillstorm. She doesn't back down, and Stillstorm gives a revolted look; the implication is that there was a harsh telepathic exchange between them.
Sabrina Online: While giving birth to Timmy, Amy lets Thomas KNOWright off the bat◊ that despite her initial desire, natural delivery is not for her at all.
Chat Noir gives two in "Copycat": one to Scarlet Lady when Théo mentions thinking the two heroes were in love, and the second when Théo starts Crush Blushing on Marinette.
In "Mr. Pigeon", Nathalie and M. Damocles fire a double-barrel glare at Chloé when she not only plagiarizes Marinette, but tries to blame Sabrina.
Alya and Ivan do this to Nino in "Horrificator" when they learn about the kissing scene the latter wrote in behind everyone's backs (the former because it's her script he changed, the latter because his girlfriend Mylène would have had to act it out).
In "Rogercop", Marinette gives Chloé a flat stare after the latter accuses her of stealing her bracelet, while Adrien and Tom have matching furious looks while defending Marinette.
In "Reflekta", Adrien hits Chloé with a withering look after she traps Juleka in the bathroom, ruins the photo with her attempts to force herself onto his arm, then 'suggests' to the principal that they don't have time to retake it with so many other classes waiting for their pictures.
In "Volpina", Adrien is not happy when he finds out that Lila threw out his father's book on the Miraculous after she stole it from him.
The entire class gives Chloé a laser-focused one in "Zombizou" after it becomes clear Chloé ruined Marinette's present for Mme. Bustier out of pettiness.
Schlock Mercenary: Multiple characters can do this. Kevyn is apparently quite good with them off-screen, but the grand prize has to go to Massey Reynstein after a long, busy night of mayhem.
Sluggy Freelance: Bun-bun is a simply drawn rabbit, which means that most of the time he only wears one of three expressions: round eyes, bored eyes, or angry eyes. When the last appears (which is not seldom), you should be very afraid. Many creatures multiple times his size are.
Sonic vs. Goku: In Chapter 2, Goku shoots an epic glare to Sonic after the blue hedgehog lands a heavy kick to his face that actually draws blood in his mouth. Sonic is unsettled that he takes a step back.
Cassie receives a positively feral one from a drunk Ally when she walks in on her and Lisa initiating something in the toilets of a club.
At the start of Chapter 5, Lisa outdoes Ally in a big way when her brother Jimmy suggests inviting Ally (who she is very, very pissed at following the end of Chapter 4) over to their parents' place. The glare she gives him could "curdle milk" according to him.
Tiger, Tiger: Upon encountering Jamis in the middle of an enormous storm that's threatening to capsize the ship— with both men well aware that the reason they're in such a dire situation is that Jamis didn't want to go through the effort to make proper precaution— Remy simply glares at him.
Remy: I had no words for him.
Unsounded: When Damphir beats a bound and gagged Duane she gets yelled at by Lemuel, similarly bound, who says that if she touches his brother again he'll see her dead. She responds by flicking Duane in his unconscious face, to which Lemuel glares at her furiously.
Yumi's Cells: The metaphorical Yumi Laser Beam shoots out of Yumi's angry eyes, causing the target to feel immense heat. When Ruby is flirting with Wook, she feels the heat and turns around to see Yumi glaring at her. Yumi almost uses it on Woong when he pretends to not have dinner plans on her birthday. Hundreds of episodes later, Yumi blasts Soonrok's face with full force when he unknowingly name-drops her ex's restaurant, though he's unfazed by her glare.