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Ben 10 Wiki
34497a3fe0ef52949a1ba8e99894ed69 This article belongs to the Classic Continuity

Well, well, well. If it isn't the con artist formerly known as Prince.

Kevin's reaction to Simian's return.[1]

Simian is an Arachnichimp con artist who debuted in Birds of a Feather.


Being an Arachnichimp, Simian bears a strong resemblance to Spidermonkey. However, he has yellow eyes instead of green, his pupils were smaller compared to Spidermonkey, and his fur is a lighter shade of blue, also lacking an Omnitrix symbol, and stripes on his tail.

In Omniverse, he still looks like Spidermonkey, but now has black eyes with yellow pupils. His hair is light blue with white streaks and now he has a flipped-up hairstyle. In addition, he wears clothing now, notably a pink golf shirt. He also now has two white stripes on his tail.

In Collect This, Simian wore a wig identical to Gwen's hair, a purple plaid skirt, and Kevin's blue wholesters.


Being a con artist, Simian rarely looks out for anyone other than himself, unless it furthers his goals. Even after the team and Eunice saved his home world from being taken over by DNAliens, he took it as an opportunity to steal and sell a DNA Repair Gun to the Incurseans.[1]

Simian is very conniving, often constructing elaborate plans to make a profit. He is skilled at manipulating others, such as acting meek in front of Ben to gain his trust, feeding into Deefus' ego, or pressuring Hokestar with the threat of his show getting cancelled.[2] Despite Ben and his team often foiling his schemes, Simian outwardly appears to harbor no ill will towards them, and instead puts on a suave demeanor. Similarly, he was subservient to Argit while working under him until he was out of earshot.[3]


Alien Force[]

Simian appeared for the first time in Birds of a Feather, where, after arriving on Earth, he saw Spidermonkey, Gwen and Kevin being attacked by a group of DNAliens. Mistaking Spidermonkey for a true Arachnichimp, Simian interfered in the fight and forced the DNAliens to leave, saving the group. When learning he had actually saved "Ben 10" and his team, he declined their offer to join their team to fight DNAliens, stating he couldn't. He also said that he didn't know anything about DNAliens.

Later however, Ben surprised him when he was stealing equipment from a cryogenics lab. Goop helped him to escape, but asked for an explanation. Simian then replied he was the Prince of Aranhascimmia, and that in order to prove he was a worthy king, he had to get and bring back to his planet a crystal from a base on Earth's Moon. Feeling empathy for him, Ben decided to help him and convinced reluctant Gwen and Kevin to come too.

Arriving on the moon, the group successfully passed through the base's defenses, even being crushed before spraying the acid on the floor, but Ben started having doubts about Simian's motivations when he asked him to attack Lu, the harmless guard of the base, and tried to kill him himself when Ben refused. It was eventually revealed that Simian had lied to Ben, and was actually a mercenary hired by a Highbreed to steal the crystal, which was the power source of a communication base needed by the Plumbers to protect Earth from the inevitable Highbreed invasion. He pushed Kevin aside when he made his escape. Later, while he was getting to the ship, he attacked Gwen.

Ben later stated that he fully doubted Simian when he mentioned the DNAlien's acid, because Simian said he had no idea who DNAliens were.

When bringing the crystal back to his client, Simian realized too late that Ben had replaced the crystal inside the container with a DNAlien ear cleaner filled with worthless, but powerful acid. Thinking this was a joke from Simian, the Highbreed chased after Simian and seemingly attacked him with the acid. The Highbreed then took Simian to the Highbreed ships and locked him up.

Ultimate Alien[]

Simian was imprisoned by the Highbreed, but he escaped and returned in Simian Says, stealing a Xenocite from the Highbreed during his escape. He then headed to Aranhascimmia where he sold the Xenocite to Mizaru. However, the Xenocite broke loose of the container and attacked Mizaru, forcing Simian to plead for Ben's help as this lead to a DNAlien pandemic on Aranhascimmia. At first, the group was reluctant but agreed to aid him since the innocent Arachnichimps shouldn't suffer because of Simian's selfishness and stupidity. After saving all the Arachnichimps and defeated Mizaru, Ben commented that Simian could be a prince, noticing him destroying the last Xenocite.

At the end of the episode, Simian sold a genetic repair gun he found earlier to Emperor Milleous, revealing he had returned to his criminal ways (thus proving that Kevin was right about him).


CT (361)

Simian being captured by Collectimus

Simian returned in Collect This as the new "Gwevin" of the Ben 10 show. He was later revealed to have sold out the Earth to Collectimus in Ben's name. However, his plan went sour as he was "collected" by Collectimus as one of the Gwevin characters.

In The Color of Monkey, Simian appeared as a second-hand man to Argit, in Argistix Security Inc.. He later betrayed Argit by giving Rojo a box containing a Tiffin. After Rojo was defeated, Simian attempted to tell the Plumbers what Argit was really doing, but he was knocked out by one of Argit's quills and got taken away.

Powers and Abilities[]

Like all Arachnichimps, Simian has enhanced hearing and agility, can stick to and scale walls, and shoot webs from his tail, which is also prehensile. He also has enhanced durability, as he withstanded a punch from Ben.[4]

Simian is very skilled in hand-to-hand combat, able to defeat multiple DNAliens in rapid succession with ease.


Simian can be rendered unconscious when hit with one of Argit's species' quills.[3]

Simian is vulnerable to electricity.[4][1]


Alien Force[]

Season 1[]

Ultimate Alien[]

Season 3[]

  • Simian Says (first reappearance; flashback and present)


Season 6[]

Season 7[]


Higher primates are called Simian in biology.


  • Simian's character on the show, Gwevin, is named after a combination of Gwen and Kevin's names.
  • Simian's purple plaid skirt looks exactly like Sunny's in Omniverse.
  • Simian's shirt in Omniverse was inspired by one of Diedrich Bader's shirts. Diedrich came in to record his lines without ever having seen his design.[DJW 1]


Derrick J. Wyatt[]

Prime Timeline
Vilgax Bioid (Original)Bioid (Omnitrix Army)MechadroidSquid MonsterUltimate Vilgax
Dr. Animo Mutant FrogMutant HamsterMutant ParrotLiving MammothLiving TyrannosaurusHeatbatMutant Seagull (Original Series)Mutant OctopusMutant Lepidopterran/Splixson HybridMutant BatMutant Prairie DogMutant HornetPterodactylPterodactyl LeaderMutant KangarooMutant SnailMutant AntMutant MosquitoMutant GiraffeTechnobugChupacabraFrankencryptidMutant Squirrel
Bounty Hunters SixSixSevenSevenEightEightSynthroidSunderKraabVulkanus
Zombozo Acid BreathFrightwigThumbskullZombie Clowns
Rojo's Gang RojoAzulAmarillo
Magic AddwaityaCharmcasterDarkstarPallorfangScrutin
Forever Knights Sir DriscollEnochPatrickUrienSir CyrusJoseph ChadwickConnorSir DagonetDr. JekyllSir MortonSir ReginaldTwin KnightsSquireCoach FinnMech DragonRed KnightSquires
Great One Enforcer AlienInterpreter AlienLeader Alien
Zs'Skayr CrüjoKuphuluLord TransylMummyViktorWerewolfAnur-Mirrored BenAnur-Mirrored CharmcasterAnur-Mirrored HobbleAnur-Mirrored RookLiving Pumpkins
Vengers Billy BillionsCaptain NemesisKangaroo KommandoMazumaSimonsWill Harangue
Lenopan Mr. MannMrs. MannCamille's Ex-BoyfriendMann Family's Bodyguard
Road Crew Baron HighwayTurbineRoad Rage
Evil Bens EonAlbedoBad BenBenzarroEon's ServantsMad BenNega Ben
Highbreed Highbreed CommanderDNAlienEdnaMoeShemMizaruXenocite
Incursean Empire MilleousAtteaRaffMajor GlorffLieutenant RanaSangfroidWay Bads
Vreedles MaPaOctagonRhomboidParallelogramIsosceles Right TriangleDodecahedronPretty Boy
The Hive Elena ValadisMicrochipDecoy QueenLiving BuildingsShip-It Employee
Aggregor AggrebotsUltimate Aggregor
Dagon LucubraConduit EdwardsRichEsoterica
Faction Dr. PsychobosKhyberKhyber's PanuncianMalware
Psyphon Bug-LiteBouncerBubble HelmetLiamGorvanPsyphon's MinionNightmarish AlienPiscciss Volann PrisonerPickaxe AliensSweet-Eels SparklefunkHooded AlienThunderpigTummyhead
Fistrick CorvoHoodlumFistrick's Thug
Rooters ServantisPhil BillingsRagnarokSwiftLeander
Robots B.L.R.R.T.S.A.M.Slix VigmaSlix Vigma's BodyguardsRed RobotComputronComputron's MinionsOttoTechadon RobotsMechaneerNaljian DestructorR.E.D.sMouse MinionsStalkerRemoteJungle Guardians
Others AntonioBenevelonBlue LeaderBuzzCharles ZenithClancyCodon Stream MonsterConvictMayor ColemanCollectimusLord DoomicusDuaneFrankPrince GyulaHammerHowell WainwrightHulex ColonelHulex WorkersInspector 13JackJarettJonah MelvilleKolarCaptain KorkKrakkenKundoLepidopterran PrisonerLiving MushroomsMaltruantMino-TogaMissyMorggMutant SeagullsMyceliumNyancy ChanPiscciss KrakenPinkyPlant AlienPlant ClonesPoltroonPrisoner 775Red LeaderSeebikSimianSolid PluggSsserpentSubliminoSuemungousaurSunnySurgeonTetramand PrisonerTrash MonsterTrombipulorViolet OffendersKing XarionYetta
Alternate Dimensions/Timelines
Original Future Timeline Dr. AnimoExo-SkullKevin LevinMot SnikrepSplootVilgaxVulkanus
Omniverse Future Timeline Dr. AnimoExo-SkullSubdora
Time Heals Timeline CharmcasterHex
Dimension 23 Carrot MonsterOrange Offenders
Mad Ben's Dimension Mad Pakmar
Gwen 10 (What-If?) Vilgax
Goodbye and Good Riddance (What-If?) VilgaxBird Villains
Books AnimusAztakCaeciliaDJ ZenutDr. DoomFrostbyteGontuGroombahInfinite MonkeyLouie the HairdresserParasiteScornSeñor ChaosSlezakThe Collector (Collectible Heroes)The Collector (Powerless)Trash Monster (Down in the Dumps)Triple Trouble
Games Crystal ClawsFeralineForever NinjaFusion BenGiant Vilgax DestroyerMacerootRemoteSnakeflySnap DragonTerracotta ArmyTerracotta GeneralTerracotta DragonThornhoundVulpin Serpent
Non-Ben 10
Generator Rex AlphaBlack KnightBiowulfI-BolSkalamander
The Secret Saturdays V.V. ArgostMunya