In her younger days, Elastigirl was very adamant about breaking into a man’s world (that is, the world of superheroes). She also didn't feel that marriage was in her future because she believed that marriage would ruin her style. However, she ultimately falls in love with Mr. Incredible and marries him. Following their marriage and the subsequent outlawing of Supers, Helen gives up her feminist attitude of breaking into the male-dominated world of Supers, as their abolishment makes that a moot point. She takes on a more traditionalist mindset as a wife and mother.

As a housewife, she has a sharp wit and cares for her family's well-being. She wants to make them happy but is concerned with ensuring nobody finds out that they are superheroes. While she can sometimes be a little irritable, she usually tries to remain composed, though she can get panicked or angry under pressure. She is often more authoritative with her children than her husband Bob, who is often too distracted to be substantially authoritative. An argument with Bob occurred over Dash being punished for performing a prank, which Bob actually thought funny. Helen argued that Bob is encouraging rebellious behavior in Dash, something she wants to nip in the bud. Her biggest concern is that since both she and Mr. Incredible were superheroes, their marriage has begotten "superkids", and she does not want her children to break the anti-Super law (whereas her husband takes the stance that the kids need to revel in their very special abilities).

Helen adjusted skillfully to the anti-Super law by completely renouncing her career as Elastigirl, which spared her from becoming Syndrome's target, unlike her husband and Frozone. She uses both her superpowers and her innate abilities as a wife and mother to unify her family and protects them at all costs. She is quick-witted, resourceful, talented, passionate, driven, and supportive. Throughout the story, she is the only unwavering character, always sure of herself and always caring for those around her. She is the stronghold of the Parr family and is the glue that holds them all together.

She is extremely loyal to her husband and would never betray him, becoming surprising suspicious and jealous Everytime he spent an extended amount of time around other women.

Helen is in her late thirties, and she is 5'8" (173 cm) in height, and she is 125 pounds (56.8 kg) in weight. She has fair skin, rosy cheeks, pink lips, auburn (reddish-brown) hair, and brown eyes.

In her glory days as Elastigirl, she had long reddish hair and a slim, athletic figure, with the exception of rather wide hips. She wore a light grey leotard with a black and white "E"/"G" insignia on the chest, with a scarlet headband, mask, and belt, long scarlet gloves, and thigh-high scarlet boots. When she wore the outfit again when first visiting Winston Deavor, she wore dark tights.

After fifteen years of forced retirement and three children, Helen wears her hair in a medium bob, and much to her chagrin carries a little extra weight on her abdomen, hips, thighs, and buttocks. Following Mr. Incredible's secret return to hero work, the family's old friend and designer extraordinaire Edna Mode designs a new super suit for him, along with matching suits for Helen and their three children. Helen's "Mrs. Incredible" super suit is a red leotard with an orange, black and yellow "I" insignia on the chest that houses a homing device, along with a black mask, long black gloves, black bottoms, an orange belt, and thigh-high black boots.

Personality: Patient, Protective of her family, Outspoken, Brave, Self Conscious of her appearance, Heroic

Gets rather emotional when it comes to even talking about something happening to her family, it's her biggest fear, behind Bob cheating on her.

She is very expressive with her body language, commonly using her hands when she talks, and putting a hand on her hip.

Abilities:

Elasticity: Elastigirl can convert the mass of her entire body into a highly malleable state at will. In such a state, she can stretch, deform, expand, or compress her entire body or parts thereof into any contiguous shape she can imagine. She can extend her limbs, torso, or neck to great distances: according to her NSA file, Elastigirl's functional stretch length is 30 meters. The Operation Kronos database stated that she can leap up to 80 feet (24.39 m) via her elasticity. She can also extend her body in two directions, creating a canopy, parachute, or sheath, its thickness determined by the extent of its distention; Elastigirl's minimum thickness is recorded by the NSA as being 1 mm. Her overall strength diminishes in direct proportion to her maximum elasticity. Superhuman Agility: Helen possesses super agility, which allows her to perform acrobatic and gymnastic movements very easily. Enhanced Strength: Though superhuman strength is her husband's specialty, she is strong enough to lift and toss a manhole cover, with some difficulty, even though a manhole cover weighs over 200 pounds. She can also knock out a man with one punch

Shapeshifting: She has also shown the ability to shape-shift by means of her elasticity. An example of this is when she transforms into a boat in the middle of the ocean to get Violet and Dash to shore. Another instance is when she transformed into a parachute twice in the first film: first to safely land Violet and Dash in the ocean and second to safely bring Jack-Jack back onto the ground.

Density Changing: Helen can augment her bodies shape including compressing it down into a compact form, with her mass remaining the same her can increase or decrease accordingly. Superhuman Durability: Due to the great malleability and elasticity of her body, Elastigirl has high durability to physical injury. A high degree of protection is also afforded by her super suit. Combined with her super-flexibility, this, in theory, should make her immune to bullets, though this is never truly demonstrated, save for when she is caught in between several doors while sneaking into Syndrome's compound and manages to have a ricochet of bullets deflected from hitting her leg by her super suit's boots. However, Edna Mode verified her suit was capable of withstanding gunfire. Abilities Piloting: Helen Parr is a highly skilled pilot, with implied military training. Expert Hand-To-Hand Combatant: Elastigirl is shown to be an exceptional operative, investigator, and tactician, as well as a masterful hand-to-hand combatant. She could easily take out Syndrome's grunts using a combination of her combat skills and her powers and could even determine where a grunt's face was without being able to look at him. While under the control of Evelyn Deavor, she easily defeated Mr. Incredible, who is a skilled hand-to-hand combatant in his own right. However, it should be noted that she caught him off-guard and Mr. Incredible was holding back at the time. Enhanced Eyesight: Elastigirl has shown to be able to spot minuscule objects with Eagle Eyes, even at long distances because her own sight stretches as far as her own limbs: she was able to spot a tiny piece of wall on Bob's shoulder even from the other side of a dim-lighted room. Expert Motorcyclist: Elastigirl is an expert at driving motorcycles, having once had her own personalized motorcycle that was called the Elasticycle before her retirement. She demonstrated great skill in driving the one given to her by Evelyn and was able to ride precarious ledges and use her elastic powers to slingshot herself and her cycle across far distances in order to catch up to a runaway train. Stealth: Elastigirl managed to invade Syndrome's compound without being caught, even when taking out multiple guards. Furthermore, completely retiring from her superhero identity kept her from being targeted by Operation Kronos

Weaknesses:

Temperature Extremes: If Elastigirl is exposed to extreme cold, her body becomes harder and less pliable as the temperature decreases until ultimately it actually becomes brittle, possibly breaking if she exerts too much force. Likewise, if she is exposed to extreme heat, such as electricity, she seems to enter a pseudo-melted state, where she is limp and extremely pliable. Elasticity: Her own elasticity can sometimes be problematic, as it caused her leg, torso, and arm to be caught in three doors. Blunt Force: Absorbing large shocks to her form is physically exhausting and a sufficient amount of blunt force, such as three anti-aircraft missiles going off at the same time, can render her unconscious. Also, in spite of her bodily malleability, Elastigirl can be disoriented by solid enough impact, such as her own blows, as seen when Voyd re-directed one of Helen's elongated punches through a portal and causing Elastigirl to accidentally punch herself, leaving her briefly dazed. Forced Stretching: Forced stretching, even under several tons of load, appears to cause pain and discomfort but no permanent or even temporary harm.