Gaz Membrane
Homeworld Earth
Gender Female
Hair Color Purple
Eye Color Brown/Amber
Affiliation(s) None
First Appearance The Nightmare Begins
Voice Actor Melissa Fahn (English)
Ana Lobo (Spanish)
Haruhi Nanao (Japanese)
Yvonne Greitzke (German)

Gazlene "Gaz" Membrane is the menacing younger sister of Dib Membrane and one of the supporting characters of Invader Zim. She is also the daughter of Professor Membrane. Known for her dark, violent and antisocial personality, Gaz has frequently expressed her disdain for the rest of the human race, seeming to care about only two things in the world: pizza and video games. Few have been known to get between her and those two things and walk away unscathed.

Gaz was voiced by Melissa Fahn in the original English version, and by Haruhi Nanao (七緒はるひ) in the Japanese dub. In the German dub she is voiced by Yvonne Greitzke, and in the Spanish dub she is voiced by Ana Lobo.[1]


Gaz artwork full

Gaz's full appearance on the show.

In the show, Gaz wears a short black dress with striped gray sleeves, striped reddish leggings, black shoes, and a necklace in the shape of a skull. When she was younger, she dressed similarly, but with the addition of a pink hair bow. Though her dress style is vaguely gothic in appearance, Jhonen Vasquez has stated that he does not see Gaz as a goth.[Citation Needed] In the comic, Gaz instead wears a teal t-shirt with a rabbit-like skull on it, a black skirt, and thick gray boots.

Gaz's new appearance in the comic.

The most unique characteristics of Gaz are her hair and eyes. Her purple hair, resembling a stylized bob cut, is cubic and fashioned into five spikes, resembling a set of fangs. While normally closed, her eyes open when she is surprised, enraptured, or deeply irritated, revealing them to be amber in color.

Jhonen has confirmed that Gaz, along with her brother and father, are very pale Mexicans.


Screen Shot 2012-08-04 at 4.33.26 PM

Bringing down an elevator singlehandedly.

Gaz is best known for her creepy, dark, cynical and antisocial nature, along with her obsessions over pizza and video games. If a person interferes with her, or with what she enjoys doing, she will often vow revenge, although whether or not she follows up on her vow depends on the situation. A prime example of her vengeful nature can be seen in "Game Slave 2", where she stalks and terrorizes someone in order to get back a handheld console that was stolen from her.
Dib Inside Out (Bloaty's Pizza Hog)

Gaz's usual concern for her brother's welfare.

In line with her dour nature, Gaz has rarely been seen smiling. The only instances where Gaz has smiled were in "Parent Teacher Night" (while laughing at Zim and Dib’s misfortunes), "The Wettening" (before dropping a water balloon on Dib), and "Gaz, Taster of Pork" (when sending her robotic toys after Dib). She also smiled a few times in the "Pilot", but given the many inconsistencies seen in it, its canonicity is dubious.

Gaz cares little for most people, and generally regards human interaction as nothing more than a means to an end. Several issues of the comics have shown her playing online with other gamers, although whether these are friends or simply another means to an end is unknown.

Her attitude towards her brother, Dib, is a bit more complex. Although she frequently complains about his behaviors, she still walks to school with him, sits next to him at lunchtime, and even partakes in chatter when he’s nearby. While she will still inflict vengeance upon him if he crosses a line, their behavior with each other simply reflects typical sibling dynamics: squabbling, but affable enough.

Although she is often angry and bitter, her few interests have been known to coax a more positive side out of her.


Role in Invader ZIM

Gaz Game Slave 2 1

Gaz has a tendency to seek revenge on those who cross her... and she usually gets it.

Gaz is the only person, with the exception of Dib, to recognize that Zim is an alien. In "Bloaty's Pizza Hog", she replied to Dib's comment on Zim with an indifferent "but he's so bad at it", and in "Gaz, Taster of Pork", she remarked that he's "too dumb to take over the Earth".

Gaz often stays out of Zim and Dib’s conflicts, but on occasion, she has bailed out her brother - but only when it benefits her, like in "Bloaty's Pizza Hog" and "The Most Horrible X-Mas Ever".

Although she usually only plays a supporting role, often as the unwilling sidekick to Dib, she has been the main subject in some episodes of the show and issues of the comic.


Fiery Background with Gaz (Gaz, Taster of Pork)

An immediate change of atmosphere occurs when Gaz is agitated.

Throughout the show, Gaz has been shown to have several strange powers. These include, but are not limited to: offscreen teleportation, levitation, and some sort of pyrokinesis. On more mundane levels, she has also demonstrated the ability to pilot Irken ships and perform some type of martial arts (described in the "Ten Minutes to Doom" transcript as "ninja moves").

One of the rare occasions she has smiled. Here, she is smirking at Zim when he is about to chew beans.

Although Steve Russel has stated that Gaz possesses some level of supernatural power, Vasquez has gone on record stating that Gaz has no genuine powers of any sort, and that she is simply "someone you don't want to anger".

If Gaz is an creation of Membrane’s, as Dib possibly is, then her more supernatural abilities could possibly be a result of her artificial nature.

Facts of Doom

He Will Pay! (The Nightmare Begins)
  • Her voice actress, Melissa Fahn, has stated in the commentary for "The Most Horrible X-Mas Ever" that Gaz actually can show positive emotions and love others; she just does not like people interfering with her life and thinks she is better than others, hence her rotten and ill-mannered demeanor around most of the people she makes contact with.
    • Melissa also stated in the same commentary that Gaz is the smartest character, even more so than her own father, agreeing with Jhonen. This seems to explain why, unlike Dib, she doesn't view Zim as an ultimate threat to Earth.
  • Her misanthropy and abuse of her brother have caused controversy from the magazine Christian Parenting Today. Jhonen Vasquez has not made any comment on the controversy, nor has Melissa.[Citation Needed]
  • Ironically, in contrast to Gaz’s usual attitude, her voice actress, Melissa Fahn, is actually very pleasant and friendly.
  • Gaz's full first name is Gazlene, a play on the word gasoline. This play on words fits her personality rather well: like gasoline when ignited, Gaz has a very fiery temper when provoked.
    • She is one of the only main characters to have a full name with more than one syllable, or a name that is a wordplay.
    • The word "gaz" is also the name of a type of candy found in the Middle East.
    • The word, translated from Farsi, means "sap".
    • The word is also the French word for gas (as in the fuel).
  • Like Zim, Gaz is ambidextrous. She can be seen drawing with her right hand in "The Wettening" and with her left hand in "Bloaty's Pizza Hog".
  • Although her eyes are amber in color, they were supposed to be light blue, as they were in the Pilot. A coloring error led to her current eye color.
    • A few issues of the comic series give Gaz different eye colors - Issue 5 presents them as green, while her cameo in Issue 17 presents them as purple.
Super close up of Gaz's face

Gaz's eyes

  • In an image on Nicktoons's official site [Citation Needed], Gaz is seen sitting playing her Game Slave 2 in Zim and Dib's classroom in front of Ms. Bitters, who is growling at her. However, "Parent Teacher Night" and "Gaz, Taster of Pork" notably explain that she is in Mr. Elliot's class.
  • Gaz is a playable character in Nicktoons MLB, alongside Zim. Best used as a pitcher, her throw (which leaves behind a trail of cartoony skulls) is one of the fastest in the entire game. Her clothes are the same as in the show, only her dress has pinstripes, and she wears a red baseball cap, which transforms into a first baseman's helmet when she is at first base.
  • Gaz appears in Nicktoons: Globs of Doom, with Melissa Fahn reprising her role. She can be rescued alongside her father in the Skool stage. When you rescue her, she actually congratulates you; however, she is not playable.
  • In "The Most Horrible X-Mas Ever", Gaz's anger and hatred is said by Jhonen to be able to fix the Tak Runner. If not taken as a joke, this could suggest that Irken ships can be fixed faster by intense emotion alone, or that this is simply another power of hers.
  • Gaz's clothing style bears a strong resemblance to that of Pepito the Antichrist, another creation of Jhonen's.
  • Of the four main characters, she has the least screen time in the series.


Main article: Gaz Membrane/Images


  1. Invasor Zim on doblaje wikia

See also

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