Villains Wiki

Hi. This is Thesecret1070. I am an admin of this site. Edit as much as you wish, but one little thing... If you are going to edit a lot, then make yourself a user and login. Other than that, enjoy Villains Wiki!!!

READ MORE

Villains Wiki
Advertisement

Mirroring complete. Disc activated and synchronized. Proceed to games.
~ Gem.
Survive.
~ Gem to Sam Flynn.

Gem is a program known as a Siren who appears in TRON: Legacy. She works in the armory underneath the Game Arena along with three other Sirens, outfitting programs and digitized users with armor for the games.

She was portrayed by Beau Garrett.

Biography

Gem first encountered Sam Flynn when he was captured and sentenced to fight in the Arena. She and the other Sirens equipped him with his attire and Identity Disc, disregarding his discomfort at their attentions. Unlike the other Sirens, Gem lingered outside her pod at the side of the armory room as Sam asked her what he was to do now. With an enigmatic smile, she responded, "Survive."

She encountered Sam again in Zuse's sector, ostensibly by coincidence, and conducted him to the End of Line Club to meet the program he was looking for, telling him that she wished she could have met him under different circumstances. In the club, she sought out Zuse, murmuring to him that she had brought "your boy Flynn," and accompanied them up to Zuse's private lounge. When Black Guards invaded the club looking for the user, Gem was revealed to be in league with Zuse, who had summoned them as part of his bid for power over the Grid.

Gem remained at the club after Sam escaped, standing with Zuse when he attempted to trade Kevin Flynn's identity disc to CLU 2 in exchange for control of Tron City. CLU accepted the disc, but his guards mined the club with light grenades as he left, leaving Gem and a stunned Zuse behind him.

Moments later, explosions demolished the top floor of the club, presumably derezzing Gem and Zuse along with it.

Personality

Gem possessed a straight-to-the-point, stoical temperament. She usually had a pleasant but calm and focused look on her face; her smile occasionally had a sardonic tilt. She faced Sam's scrutiny, a chaotic battle at the End of Line, and her own imminent destruction with the same stoic demeanor.

When Jarvis attempted to flirt with her while Zuse was negotiating with Clu, she responded with an eyeroll and an expression of faint revulsion.

She also displayed interest in Sam outside her roles as Arena outfitter and femme fatale, watching his reactions to the club and appearing to give him a genuine smile when telling him her name.

Gallery

Trivia

  • Gem (Graphical Environment Manager) was also the name of a short-lived attempt at a graphical user interface for CPM and DOS (predating Microsoft Windows) that looked like Apple's Macintosh operating system.
  • Like one of the Sirens of mythology, Gem lured the traveler, Sam, into danger at Zuse's club.

Navigation

           Disney Logo.png Villains

Animated Features
The Evil Queen | Magic Mirror | Honest John | Gideon | Stromboli | The Coachman | Coachman's Minions | Monstro | Chernabog | Zeus | Vulcan | Boreas | Man | Ronno | Aconcagua | Toy Bull | The Wolf | Tetti-Tatti | Willie the Giant | Lumpjaw | Rustlers | Mr. Winkie | Weasels | Brom Bones | Headless Horseman | Lady Tremaine | Anastasia Tremaine | Drizella Tremaine | Lucifer | Queen of Hearts | Card Soldiers | Cheshire Cat | Walrus & Carpenter | Captain Hook | Neverland Pirates (Mr. Smee) | Tick Tock | Rat | Si & Am | Maleficent | Diablo the Raven | Maleficent's Goons | Cruella De Vil | Jasper and Horace | Madam Mim | Shere Khan | Kaa | Bandar Log (King Louie) | Edgar Balthazar | Prince John | Sheriff of Notthingham | Sir Hiss | Captain Crocodile | Rhino Guards | Wolf Arrowmen | Trigger & Nutsy | Heffalumps and Woozles | Madame Medusa | Mr. Snoops | Brutus & Nero | Amos Slade | Chief | Horned King | Horned King's Army (Creeper & Gwythaints) | Cauldron Born | Orddu, Orwen & Orgoch | Arawn | Professor Ratigan | Thugs (Fidget & Felicia) | Bill Sykes | Roscoe & DeSoto | Ursula | Flotsam & Jetsam | Percival C. McLeach | Joanna | Gaston LeGume | LeFou | Asylum D'Loons (Monsieur D'Arque) | Tom, Dick, Stanley & Walter | Prince Adam | Jafar | Iago | Razoul | Prince Achmed | Gazeem | Cave of Wonders | Oogie Boogie | Lock, Shock and Barrel | Scar | Hyena Clan (Shenzi, Banzai & Ed) | John Ratcliffe | Frollo | Frollo's Soldiers (Captain Phoebus, Brutish Captain, Oafish Guard, Pierrat Torturue & Henriet Cousin) | Hades | Pain and Panic | Fates | Cerberus | Titans (Lythos, Hydros, Pyros, Stratos & Arges) | Nessus | Hydra | Nemean Lion | Shan Yu | Hun Army (Hayabusa & Elite Hun Soldiers) | William Cecil Clayton | Sabor | Clayton's Pirates | The Firebird | Jack-in-the-Box | Black Triangles | Snooty Flamingos | Kron | Bruton | Kuzco | Yzma | Kronk | Lyle Tiberius Rourke | Rourke's Mercenaries (Helga Sinclair) | Leviathan | Vikings | Captain Gantu | John Silver | Pirates (Scroop, Onus, Hands, Turnbuckle, Blinko, Longbourne, Fayvoon, Grewnge, Krailoni, Hedley, Torrance, Mertock, Verne, Crex & Zoff) | Nathaniel Flint | Alameda Slim | Rico | Willie Brothers | Mr. Wesley | DOR-15 | Bowler Hat Guy | Dr. Calico | Dr. Facilier | Lawrence | Facilier's Shadow | Shadow Demons | Ian the Gator | Marlon the Gator | Reggie, Darnell & Two Fingers | Friends on the Other Side | Mother Gothel | Stabbington Brothers | Turbo/King Candy | Cy-Bugs | Sour Bill | Wynnchel & Duncan | Prince Hans | Duke of Weselton | Erik & Francis | Robert Callaghan | Alistair Krei | Mr. Yama | Dawn Bellwether | Doug Ramses | Woolter | Jesse | Sheep Cops | Ram Thug | Duke Weaselton | Mr. Big | Polar Bear Thugs (Koslov, Raymond & Kevin) | Te Kā | Tamatoa | Kakamora | Arthur the Insecurity Virus | King Runeard | Druun | Namaari | Soldiers

Live-Action Films
Giant Squid | Captain Nemo | Prince John (1952) | Sheriff of Nottingham (1952) | Red Gill | Red Stick | Amos Thorpe | Santa Anna | Bigfoot Mason | Chato | Samuel Mason | Harpe Brothers | The Marten | Wilse Owens | Pony Sugrue | Sheelah Sugrue | Kuala | Vicky Robinson | Ute Chief | Jacques Lebeau | Makoos | Durante | Barnaby Crookedman | James Haggin | Cattlemen | Alonzo Hawk | Comanche Chief | Apaches | Mr. Dawes Sr. | Tanamashu | Judge Higgins | Mountain Ox | Peter Thorndyke | Havershaw | Vince Heber | Mrs. Satterfield | A.J. Arno | Chillie Walsh | Colonel Pierson | Ab Cross | Colonel Heller | King Leonidas | Bookman | Swinburne | Mr. Eben | Mark Pierson | Hugh McRae | Sam Eagle Speaker | Kerwood Krinkle | Frank Sitwell | Hnup Wan | Dr. Terminus | Gogans | Charles Olympus | Mr. Stallwood | Mr. Smith | Omar | Wooly Bill Hitchcock | Big Mac | Hans Reinhardt | The Watcher | George McKinzie | Alec Frost | Bluto | Vermithrax Pejorative | Tyrian | Master Control Program | Sark | Ed Dillinger Sr. | Program Guards | Mark Jennings | Kelly | Mr. Dark | Autumn People (Dust Witch) | Mike | Rosie Little | Hunters | Nome King | Princess Mombi | Connie | Bullwhip | Parker | Buzz | Wolf's Owner | Timber Wolf | Hunter | Eagle | Alistair Patton | Patton Sr. | Judge Doom | Toon Patrol (Smartass, Greasy, Psycho, Wheezy & Stupid) | Abdullah | Mr. Patel | Nigel | John Merrick | Beauty Smith | Luke & Tinker | Sykes | Cherokee | Lip-Lip | Fritz | Neville Sinclair | Lothar | Nigel Snyder | Joseph Pulitizer | Delancy Brothers | Charles Hendrickson | Terence Wheeler | Winifred Sanderson | Mary Sanderson | Sarah Sanderson | John Ricketts | The King and the Duke | Pap Finn | Cardinal Richelieu | Captain Rochefort | Milady de Winter | Borg Guillarson | Leland Drury | Heath | Miners | Lloyd Halverson | William Boone | Buldeo | John Wilkins | Tabaqui (1994) | Sergeant Harley | Bandits | Sergeant Clairbourne | Shere Khan (1994) | Bandar Log (1994) (King Louie (1994) & Kaa (1994)) | Gilbert Sipes | Juice | Ranch Wilder | Injun Joe | Emmett | Tony Perkis | Agent Woods | Jack and Ralph | Ashcan and Pete | Long John Silver | Aunt Sponge | Aunt Spiker | Rhino | Skeleton Pirates | Shark | Cruella De Vil (1996) | Jasper and Horace (1996) | Mr. Skinner | Jean-Pierre Le Pelt | Alonzo | Norman Snively | Ricky King | Trey | Vince | Lyle Van de Groot | Max and Thor | Lion | Beatrice Stanhope | Stepmother | Chester Hoenicker | Wilson Croft | Smith & Wesson | Bennett Hoenicker | Luanne LeSeur | Meredith Blake | Natalya | Popov | Frank Slater | Shere Khan (1998) | Tabaqui (1998) | Bandar Log (1998) | Kalabar | Eddie Taffet | Andrei Strasser | Elliot Coleye | Boogeyman | Dr. Claw | MAD Cat | Kramer | RoboGadget | Miss Hannigan | Rooster and Lily St. Regis | PAT | Malcolm | Dimitri Denatos | The Phantom | Snerbert | Lana Thomas | Josh Bryant | Baron and Baroness von Troken | Elliot T. Jindraike | Troy McGinty | Dobbs | Evil Ice Cream Man | Kal | Alex | Professor Siles | Reed Thimple | Jennifer Stone | Toy Santa | Sally & Kowalski | Louise Walker | Mr. Sir | Charles "Trout" Walker | Kissin' Kate Barlow | Linda Walker | Sheriff | Doug & Gordon | Hector Barbossa | Crew of the Black Pearl (Bo'sun, Scratch, Pintel & Ragetti) | Master Gracey | Madame Leota | Ramsley | Zombies | Werecat Lady | Carla Santini | Lord Kelvin | Black Scorpions (General Fang) | Inspector Fix | Viscount Mabrey | Edgar Dalloway | Knights of the Iron Dagger (Phil Flanagan) | Ian Howe | Bill Fawcett | Mr. & Mrs. Chuns | Zaphod Beeblebrox | Frankie & Benjy | Prostetnic Vogon Jeltz | Vogons | Humma Kavula | Gag Halfrunt | Royal Pain | Stitches | Lash | Speed | Penny Lent | Trip Murphy | Jadis the White Witch | Jadis' Secret Police (Maugrim & Vardan) | Ginarrbrik | General Otmin | Thantos DuBaer | Dr. Kozak | Dr. Gwen Lichtman | Larry | Yan-Lo | Jessica Dawson | Crew of the Flying Dutchman (Davy Jones, Maccus & Kraken) | Cutler Beckett | East India Trading Company (Mr. Mercer) | The Dominion (Silas Sinister, Chancellor Goodwin, Dr. Ichabod Grogg & Sinister Sisters) | Jack Frost | Selkirk Tander | Grim & Denning | Dark Master | Janice Avery | Queen Narissa | Nathaniel | Mitch Wilkinson | Simon Bar Sinister | Cad Lackey | El Diablo | Henry Burke | Miraz | Telmarines (Glozelle & Sopespian) | Nikabrik | Hag & Werewolf | Kendall Duncan | Tess Tyler | Speckles | Lucinda | Oswald Granger | Red Queen | Knave of Hearts | Card Soldiers | Jabberwock | Jubjub Bird | Hamish Ascot | Morgana le Fay | Morganians (Maxim Horvath, Abigail Williams, Sun Lok, Drake Stone & Marrok) | Nizam | Ms. Stout | CLU 2 | Rinzler | Gem | Black Guards | Blackbeard | Angelica Teach | The Spaniard | King Ferdinand VI | King George ll | Tex Richman | Moopets | San Than | Matai Shang | Tal Hajus | Jenny | Deimata | Myra Santelli | Latham Cole | Butch Cavendish | Jay Fuller | Thanos | Evanora | Theodora | Constantine | Dominic Badguy | Maleficent (2014) | Diaval | King Stefan (2014) | King Henry | The Giant | The Witch | The Wolf | Lady Tremaine (2015) | Grand Duke (2015) | Anastasia Tremaine (2015) | Drizella Tremaine (2015) | Lucifer (2015) | David Nix | Kylo Ren | General Hux | Captain Phasma | Supreme Leader Snoke | Shere Khan (2016) | Bandar Log (2016) (King Louie (2016)) | Kaa (2016) | Fleshlumpeater | Giants (Bloodbottler & Bonecruncher) | Orson Krennic | Grand Moff Tarkin | Darth Vader | Pramod Kadam | Beast (2017) | Gaston LeGume (2017) | LeFou (2017) | Asylum D'Loons (Monsieur D'Arque (2017)) | Tom, Dick & Stanley (2017) | The King (2017) | Armando Salazar | Crew of the Silent Mary (Lesaro) | Scarfield | BB-9E | DJ | Bucky Buchanan | It | Black Thing | Dryden Vos | Tobias Beckett | Darth Maul | Sugar Plum Fairy | Tin Soldiers | William Weatherall Wilkins | V.A. Vandevere | Neils Skellig | Rufus Sorghum | Jafar (2019) | Iago (2019) | Cave of Wonders (2019) | Scar (2019) | Hyena Clan (2019) (Shenzi, Kamari & Azizi) | Queen Ingrith | Gerda | Borra | Rat (2019) | Devon & Rex | Isaac | Emperor Sheev Palpatine | Allegiant General Pryde | Chesille Sabrond | Chandra | Artemis Fowl | Opal Koboi | Briar Cudgeon | Troll | Princess January | Aaron Burr | Thomas Jefferson | James Madison | James Reynolds | King George III | Bori Khan | Hun Army (Xian Lang) | Cruella De Vil (2021) | Jasper and Horace (2021) | Baroness von Hellman | Prince Joachim | Lope de Aguirre

Other Animated Movies
Br'er Fox & Br'er Bear | Giant Magnet | Evil Clown | Judge Doom | Toon Patrol (Smartass, Greasy, Psycho, Wheezy & Stupid) | Merlock | Dijon | Aunt Sponge | Aunt Spiker | Rhino | Skeleton Pirates | Shark | Bill Bluff | BluffCo Industries (Guy Graham, Bob & Bluff Agents) | Phillium Benedict | Anti-Recess Legion (Kojak, Fenwick, Anti-Recess Agents, Anti-Recess Ninjas, Anti-Recess Scientists, Agent Henderson, Agent Smithson, Agent Underville, Agent Franklin, Agent Morrisey, Agent Goodman, Dr. Rosenthal, Dr. Lazenby & Dr. Steinheimer) | Gelman | Gloomius Maximus | Dr. Ivan Krank | Clarabelle Cow | Von Talon | Cufflingk and Underlingk | Kazar | Wildebeests (Blag) | Scab and Scraw | Vidia | Jacob Marley | Old Joe | Supervisor | Mr. Whiskers | Shelley | Were-Rat | Sea Monkeys | Mr. Burgermeister | Ripslinger | Ned and Zed | Zarina

Direct-to-video/Disneytoon Studios Sequels/Disney+ Originals
Abis Mal | Abis Mal's Thugs | Sa'Luk | Forty Thieves | Maestro Forte | Jesters | Zira | Outsiders (Nuka & Vitani) | Mack McCro | Jim Bob | Supreme Commander | Morgana | Undertow | Cloak & Dagger | Bradley Uppercrust III | The Gammas | Buster | Sarousch | Pom-Pom | Jacques von Hämsterviel | Erik Hellstrom | Ashton Carnaby | Edgar Volgud | Krakken | Lil' Lightning | Bandits | Mama Gunda | Uto & Kago | Marina Del Rey | Cad Spinner | Orson | Sweet Pete | Captain Putty | Jimmy the Polar Bear | Bob the Viking | Bjornson the Cheesemonger

Animated Television
Flintheart Glomgold | Magica De Spell | Beagle Boys | Ma Beagle | Fat Cat | Fat Cat's Gang | Norton Nimnul | Aldrin Klordane | Baby Thaddeus | Ratso Ratzkiwatzki | Mozenrath | Mirage | Mechanicles | The Collector (Bonkers) | Cousin Zeke | Kent Powers | Henry Villanova | The Green-Eyed Monster of Jealousy | Ivy DeVil | Judge Dimsdale De Vil | Gelman | Tad White | James Stone | Dr. Slicer | Gilda | Mayor Phillip Fitzhugh | SAL 3000 | DeSilvo | Earl Raymond | Al Roker | Chuckles | Huntsman | Huntsgirl | Dark Dragon | Heinz Doofenshmirtz | Norm | Vanessa Doofenshmirtz | Lucius Heinous VII | Brad Buttowski | Brianna Buttowski | Harold Buttowski | Brick Bristol | Bill Cipher | Li'l Gideon | Stanley Pines | Abraham Kane | Donald Duck's Raw Anger | Jordan Buttsquat | Suzi | Lord Dominator | Lord Hater | Commander Peepers | Rippen | Toffee | Ludo | Meteora Butterfly | Mina Loveberry | Solaria Butterfly | Tom Lucitor | Commander Heist | Lazlo | Zhan Tiri | Lady Caine | Varian | King Edmund | Cassandra | Bradford Buzzard | Flintheart Glomgold (2017) | Magica De Spell (2017) | General Lunaris | Obake | Diane Amara | Noodle Burger Boy | Globby | Chris | High Voltage | Baron Von Steamer | Momakase | Mel Meyer | Mad Jacks | Trina | Hardlight | Chip Whistler | Gwendolyn Zapp | Hunter De Vil | Cuddles | Clarissa Corgi | Portia Poodle | Canal Crew (Fergus, Sid Squirrel & Big Fee) | Bessie the Cornish Cow | King Andrias | Captain Grime | Sasha Waybright | The Core | King Aldrich | Emperor Belos | Hunter | Lilith Clawthorne | The Collector (The Owl House) | Infinity Ultron | The Ghost Council | The Chairman | The Barrister Ghosts

Live-Action TV
Miss Hendra | Victoria Kayne | Gorog | Dominic | Evil Alex | Dr. Evilini | The Mummy | Ronald Longcape Jr. | Penelope | Kaita | Lanny Parker | King Kalakai/Yamakoshi | Zadoc | Farhog the Fierce | Lexi Reed | Susan Skidmore | Sally Jensen | Sensei Ty | Rhoda Chesterfield | Creepy Connie Thompson | Darla Shannon | Madeline | Bryn Beitbart | McD | Brooke | Victor Krane | Douglas Davenport | Marcus Davenport | Giselle Vickers | Taylor Krane | Sebastian Krane | Principal Perry | Ludmila Ferró | Jade & Matias LaFontaine | Gregorio Casal | Gery López | Priscila Ferró | Clément Galán | Esmeralda Di Pietro | Milton Vinicius | Crash Bernstein | Helga Rooney | Missy Bradford | Dawn Buckets | Laughy Cat | Brad & Brads | Agent Johnson | Brett Willis | Zane Willis | Mitch Bishop | Janet Smythe | Sebastian | Cyd Ripley | Gladys | Hazel Swearengen | Dr. Sharon Chen | Ámbar Smith | Sharon Benson | Rey Gutiérrez | Benicio | Red Sharks (Gary López) | Emilia | Ramiro Ponce | Matteo Balsano

Literature
King Nicholas

Video Games
Mizrabel | Oswald Gardner | Admiral Evar | Cogs | Herbert P. Bear | Atticus Thorn | Foxy Loxy | Goosey Loosey | Jolly Roger | Shadow Blot | False Shadow Blot

Shorts
Peg Leg Pete | Kat Nipp | Old Man Tree | Skeletons | Grim Reaper | Mad Doctor | Demon Cats | Gustav the Giant | Lonesome Ghosts | H. U. Hennessy | Witch | Pluto's Devil | Ben Buzzard | Zeke Midas Wolf | Izzy Wolf | The Three Little Wolves | Boogeymen | Captain Katt | Mortimer Mouse | Butch the Bulldog | Foxy Loxy | Ajax Gorilla | Beppo Gorilla | Witch Hazel | Adolf Hitler | Nazi School Teacher | Little Hans | Julius | Dr. Frankenollie | Grace Goodwin | Molly

Comics
Phantom Blot | Trudy Van Tubb | Doctor Vulter | Solego the Chaos God | Arpine Lusène | Monsieur Molay | Azure Blue | Lawyer Sharky | Eli Squinch | Sylvester Shyster | Fantomius | Inquinator | Spectrus | Raghor | Zafire | Newton | The Raider | Emil Eagle | Sr. X | X-1, X-2 and X-3 | Professor Nefarious | Fliplip, Sidney and Armadillo | Neighbor Jones | Anacleto Faina | Anacleto Mitragli | Beagle Boys | Ottoperotto

Manga
Ansem, Seeker of Darkness | Xemnas

Attractions
Alien | Lava Monster | Mara | Mad Hatter | Nebula Ghosts | Professor J.T. Wu | S.I.R. | Yeti (Expedition Everest) | Yeti (Matterhorn Bobsleds)

See Also
101 Dalmatians Villains | 2010 Marvel Animated Universe Villains | 20th Century Studios Villains | A Twisted Tale Villains | Air Bud Villains | Aladdin Villains | Alice in Wonderland Villains | Amblin Entertainment Villains | American Dragon Jake Long Villains | Amphibia Villains | Artemis Fowl Villains | Atlantis Villains | Beauty and the Beast Villains | Big Hero 6 Villains | Buena Vista International Villains | Buzz Lightyear of Star Command Villains | Camp Lakebottom Villains | Cars Villains | Chip 'N' Dale: Rescue Rangers Villains | Cinderella Villains | Club Penguin Villains | Darkwing Duck Villains | Descendants Villains | Disney Chills Villains | Disney Infinity Villains | DuckTales Villains | Fantasia Villains | Fillmore! Villains | Frankenstein Villains | Frozen Villains | FX Villains | Gargoyles Villains | Gravity Falls Villains | Halloweentown Villains | Hamilton Villains | Haunted Mansion Villains | Hercules Villains | Ice Age Villains | Incredibles Villains | Jack London Villains | Jerry Bruckheimer Villains | Jimmy Two-Shoes Villains | Kim Possible Villains | Kingdom Hearts Villains | Lilo & Stitch Villains | Little Einsteins Villains | Lucasfilm Villains | Marvel Animated Movie Universe Villains | Marvel Cinematic Universe Villains | Medfield College Villains | Mighty Ducks Villains | Milo Murphy's Law Villains | Monsters, Inc. Villains | Mulan Villains | Muppet Villains | Narnia Villains | New Mutants Villains | Once Upon A Time Villains | Peter Pan Villains | Phineas and Ferb Villains | Pinocchio Villains | Pirates of the Caribbean Villains | Pixar Villains | Quack Pack Villains | Randy Cunningham Villains | Recess Villains | Robin Hood Villains | Sherlock Holmes Villains | Sleeping Beauty Villains | Snow White Villains | Sofia the First Villains | Star Wars Villains | Star vs. the Forces of Evil Villains | Super Robot Monkey Team Hyperforce Go! Villains | Tangled Villains | Tarzan Villains | The Emperor's New Groove Villains | The Ghost and Molly McGee Villains | The Hunchback of Notre Dame Villains | The Jungle Book Villains | The Lion King Villains | The Little Mermaid Villains | The Owl House Villains | The Princess and the Frog Villains | The Princess Diaries Villains | The Proud Family Villains | Tim Burton Villains | Toy Story Villains | Treasure Planet Villains | Tron Villains | Wander Over Yonder Villains | Winnie the Pooh Villains | Wreck-It Ralph Villains | X-Men Movie Villains | Yin Yang Yo! Villains | Zootopia Villains

           TronLogo.png Villains

Films
Tron: Master Control Program | Sark | Ed Dillinger Sr. | Guards
Tron: Legacy: CLU 2 | Rinzler | Jarvis | Castor/Zuse | Gem | Black Guards

Television
Tron: Uprising: General Tesler | Cyrus | Paige | Pavel | CLU 2

Advertisement