Esdeath of Akame ga Kill! is one of the single most powerful human beings on earth by pure strength alone. Add to this a special weapon called a Teigu contained in her body that gives her complete control of ice (she can conjure it from thin air without any moisture) and the ability to freeze anything and everything, including time and space, makes her an enemy that requires an entire army just to pose a threat to. She is also a complete and total sadist, who delights in causing terrible pain and suffering to anyone and anything.
Nobara Ibaragi in Alice Academy has the Alice (magic power) of Ice.
Akashikibu from Blazer Drive (coincidentally, she feels true beauty should last forever and manipulates a person with the same face-concealing bangs as Deidara).
Hitsugaya's Zanpakuto, Hyourinmaru (translation: Ice Ring) is the strongest of the ice-based Zanpakuto, but due to his youth, at the start of the story it was still unmastered and placed severe limits on its ability. His Bankai is Daiguren Hyourinmaru and it enhances his ice abilities.
Rukia's Zanpakuto (Sode no Shirayuki, translation: Sleeved White Snow) freezes everything it touches, enabling it to produce ice pillars, avalanches, and ice-quakes, or turn enemies into solid ice and flash freeze everything in its radius. The power first freezes herself, reducing her body temperature to Absolute Zero, thus preventing her body from absorbing toxic substances. In Bankai, she becomes a pure white, icy statue clad in white robes. If she fights at freezing temperatures for too long, or raises her body temperature back to normal too quickly, her body will begin to fracture and shatter. While Hitsugaya boasts the strongest ice-based Zanpakuto, Rukia's is regarded as the most beautiful.
If the name of her Zanpakuto is indeed meaningful, the lieutenant of the 4th Squad, Isane Kotetsu, may be like this too (her Zanpakutou is Itegumo, translation: Frozen Cloud). Unfortunately, the series never reveals her abilities.
Filler Villain Sojiro Kusaka of The DiamondDust Rebellion movie. He has the exact same Zanpakuto as his childhood friend Hitsugaya, but since two Soul Reapers having the same Zanpakuto isn't allowed, they were forced to fight each other to see who would keep it. Hitsugayawon and Kusaka has returned to seek vengeance. He turns into a huge ice dragon towards the end.
Steven A. Starphase of Blood Blockade Battlefront has similar powers, except he uses his own blood as a freezing agent, and finishes his frozen adversaries off with a kick.
Anastasia the Glacier from Brave10 who's, fittingly, Russian and has mastery over ice jutsu. She claims to be very cold in every sense, which includes cold-hearted betrayals.
Code:Breaker: Yukihina's most common application of his power, though he seems to be able to control water in any form.
November 11 in Darker Than Black sort of counts. His ability is to drain heat from anything he touches; cells burst and water turns to ice almost instantly. He can't make ice out of nowhere, however, and needs something to conduct the freeze effect to be of much use.
Yoshino from Date A Live also has these powers in their spirit form.
Metalgarurumon in Digimon can fire ice missiles and freezing breath (the latter oddly called "Metal Wolf Claw").
He's got ice and destructive versions of all his attacks, all of which are prone to being labeled "Metal Wolf Claw" or "Ice Wolf Claw" depending on how the writers are feeling (though the original name of the attack is Cocytus Breath, named after one of the five rivers of the underworld in Greek Mythology). Also, there are a number of ice-related Digimon and ice versions of non-ice Digimon. Contrary to popular belief, Gabumon is not one of these - the blue energy he fires was once used to start a fire.
Seadramon's main attack is freezing breath, which he used to encase Garurumon in ice in his first appearance. MetalSeadramon also has a freezing breath attack, at least in the non-Adventure material (there he has fire breath).
Tomoki Himi from Digimon Frontier possesses the Human and Beast Spirits of Ice, which allow him to transform into Chakkmon/Kumamon, a polar bear on skis, or Blizzarmon/Korikakumon, a twin tomahawk wielding yeti.
Tomoki is also one of two members of the team whose nameinvokes his element - the "Hi" in Himi uses the same Japanese character for "ice".
Ur's daughter, Ultear, can also use Ice magic, though she seems to have a personal distaste for it given her Mommy Issues. She only resorts to using it when Gray finds a way to counter her Time magic.
Silver of Tartaros is an Ice Devil Slayer. He's so powerful that he can freeze Natsu solid with one gesture. He also effortlessly froze the great fire dragon Atlas Flame's spirit. Fitting then that he's also Gray's father.
Invel Yura of Alvarez's Spriggan 12 is known as the "Winter General" and has mastered Ice Magic to the point that he can effortlessly create massive blizzards and overpower the Ice Magic of other wizards. Most tellingly, his attacks are so powerful they can make Gray feel the chill, despite both his training in frozen wastelands as a child and his Ice Devil Slayer Magic giving him immunity to the cold.
Tokiya Mikagami in Flame of Recca has a lot of water-based attacks, but that's mostly his low-level techniques. His high level technique includes ice-based attacks. On the other hand, his master, Meguri Kyouza, and his fellow Hyomon Ken practitioner, Kai, goes to the extreme and only uses ice.
Fullmetal Alchemist: Brotherhood gives us Isaac McDougall, the Freezing Alchemist. However, he's been shown to use not just ice, but high-pressure water, steam, and his own blood. His favored mode of killing is to freeze or boil all the water in a person's body.
Yukino Houjou of Gate Keepers, the immortal and ridiculously powerful user of the Gate of Ice and Snow.
Guyver has Bio-Freezer, a Lost Number who can shoot chilling air that can freeze a lake in a few seconds. This has come in handy for the good guys a few times, but since he has otherwise below-average abilities for a Zoanoid and his freezing power leaves him exhausted whenever he uses it, he usually ends up being Overshadowed by Awesome. Eventually, he performs a Heroic Sacrifice, allowing himself to be absorbed by Aptom in order to save his life. Aptom then gains his powers.
The yuki-onna class of demi-humans in Interviews with Monster Girls is a downplayed version of this. They can reduce their surroundings to below freezing, cries frozen tears, and maintains no body heat. However, they are not capable of causing any harm from that, and these powers are often triggeed by their own Heroic BSoD.
In Phantom Blood, Dio Brando has his Flash Freezing Power, which drains heat from his victim's bodies, freezing their blood in the process. This was an effective counter-measure against the vampire killing Ripple, which relies on breath control and the flow of blood. Jonathan had to set his own fist on fire to counter it.
Ghiaccio from Vento Aureo has the Stand White Album, which takes the form of an armor that rapidly lowers the temperature of the area around him. And then there's its secondary ability, Gently Weeps, which causes Ghiaccio's immediate vicinity to become so cold that the air around him freezes.
Born This Way, the Stand of Kyo Nijimura from JoJolion, creates hurricane-like winds that freeze the area around it, freezing water and turning air moisture into snow, as well as creating sharp weapons to hurl at the opponent, and even freeze people's breath, causing them to suffocate.
Doma from Demon S Layer Kimetsu No Yaiba. He is Most Powerful Ice Demon, Doma's blood magic takes the form of creating icy flowers and using the cold to his advantage. And Doma can create smaller clones of himself out of ice to fight alongside him. They can use all the same abilities that the real Doma can, making it a truly overwhelming technique, While most of the Twelve Kizuki are either magically or physically oriented, Doma uses a combination of ice magic and high speed to fight.
Adelheid Suzuki from Katekyō Hitman Reborn! uses ice powers because she wields the Ice Flame, one of the Seven Flames of Earth.
Mahou Sensei Negima! has Evangeline, whose ice magic can reach ice-age like states, including an ancient Greek spell that covers a 150-square foot area in absolute zero temperatures... and that's not even her strongest attack. In the sequel series UQ Holder!, she adopts the alias "Yukihime", which translates as "Snow Princess".
Snow of MÄR uses ice-style ARMs (and one water-themed, eventually). Her real-world counterpart is named Koyuki.
She's also weakened in a desert area, brought to the point of exhaustion in a volcano area, and hinted to be strengthened in an ice field.
Maria of Mermaid Melody Pichi Pichi Pitch plays up the ice angle with all she's got; she's stuck up, cruel, and often described as "cool" or "cold". While the rest of the Quirky Miniboss Squad to which she belongs harbours genuine Mad Love, her interest in her boss is purely physical and she doesn't really care whether he loves her back or not, even if she is a childhood friend. She also enjoys turning people into Human Popsicles and specifically targets lovers because warm feelings seem to physically hurt her.
Musuko ga Kawaikute Shikataganai Mazoku no Hahaoya: Fuuga can generate cold and ice. He met Lorem after his powers went out of control as a child and he froze himself. Lorem thawed him out. It is for this reason that he seeks out Lorem after learning she has a child, so he might do for Gospel what Lorem did for him.
Kuzan, a.k.a. former Marine Admiral Aokiji, possesses the power of the Chilly-Chilly Fruit or Ice-Ice Fruit. Kuzan's Devil Fruit allows him to create, control, and transform into ice. His powers are such that he can freeze a chunk of ocean (complete with sea monster) with seemingly little effort and with a guarantee that it'll last one week. He's also all-but-immune to physical attacks as, while they can still shatter his icy body, he can effortlessly reform it.
Sailor Mercury gained a snow-based attack, Shine Snow Illusion, in the Black Moon arc of the manga and gained freezing attacks, Bubble Spray Freezing and Double Bubble Spray Freezing, in the R season of the anime. But the vast majority of her abilities were either water- or technology-based.
Berthier had freezing powers in the anime, likely to amp up the fact that she was Mercury's Evil Counterpart as she appeared in the season where Mercury got her own freezing attacks.
There were some monsters that had this power; the first was the youma Blizzar.
The Materials Collection notes that Viluy has control over ice as well as machines, though she doesn't display this ability in the manga or either anime. She was yet another Evil Counterpart to Sailor Mercury, but this was heavily downplayed, if not removed entirely, in the first anime.
Jadeite had ice powers in the manga and this carried over into Sailor Moon Crystal where he got to show them off more. He's apparently powerful enough to freeze a good part of Azabu-Juuban, if not Tokyo as a whole.
Zoisite displayed this ability in the 90s anime in a case of New Powers as the Plot Demands, mostly using it to attack Tuxedo Mask. Crystal felt like making a Mythology Gag to this, so he also randomly has this ability in that continuity as well.
Cygnus Hyoga and Kraken Isaac and so is their teacher, the Gold Saint, Aquarius Camus. Also, the Crystal Saint in the anime where he explains to Hyoga how to manipulate temperature: slow down the electrons and stay away from the nucleus. Indeed Camus, unlike the other Gold Saints, specialized his Cosmo energy not in create power by the movement of atoms, but by stopping the same movement. Due to this, his power consists not in destroying the matter, but in freezing it.
Of all the attacks, "Aurora Execution" is the supreme secret ice technique and Camus most powerful attack. His Cosmos becomes glacial stream that reaches a temperature of -273 ° C.
Of the Asagard God Warriors, Merak Beta Hagen (who can manipulate fire also) and the twins Mizar Zeta Syd and Alcor Zeta Bud (their first attack, Viking Tiger Claw, produces a slight freezing effect in the body of their enemy).
Free from Soul Eater uses ice magic. But after centuries imprisoned by the witches, he's a bit rusty and does things like encase himself in blocks of ice and fall into the Thames (he was trying to use the ice to avoid falling). Being nigh-invulnerable and immortal, this isn't much of a problem for him.
Blue Rose from Tiger & Bunny. She uses a Freeze Ray to direct attacks, but can also be very versatile with her power.
Urusei Yatsura had Queen Oyuki, who was a fairly nice person, aside from occasionally freezing everything around her in a huge block of ice.
Vampire Knight has Hanabusa Aido, a vampire with ice based powers. He's actually a pretty cool guy most of the time.
Yu-Gi-Oh! GX: At her darkest point of being Brainwashed and Crazy, Asuka uses a White Night deck, which is themed after ice, symbolizing her cold-turned heart. It also serves as an inspiration for her manga counterpart's Snow deck which symbolizes her cool beauty.
Touya of Yu Yu Hakusho is a demon ninja with mastery over ice. When he went under Genkai for some Training from Hell, he became powerful enough to freeze a battlefield. Seiryuu, one of the Four Saint Beasts (and also, ironically, The Dragon to Big Bad Suzaku), also had ice powers, but he was a drop in the bucket compared to Touya. There's also Yukina, actually an ice maiden.
Tokyo Shinobi Squad has Hyosui Nagumo. An Ax-Crazy assassin known as the "Icy Executioner", he works for a major media company to assassinate its rivals' stars to cut out the competition. He keeps his hideout as cold as a winter in Antarctica and can freeze others to death with as little as a single touch.