Helen Parr (née Truax), also known as Elastigirl, is the deuteragonist of Disney•Pixar's 2004 animated film The Incredibles and the protagonist of its 2018 sequel. She is an elastic and dexterous superheroine who can stretch any part of her body to great lengths, and mold it into several shapes and sizes. Helen is married to Mr. Incredible (Bob Parr) and they have three children, consisting of Violet, Dash, and Jack-Jack.

Before marrying Mr. Incredible, Elastigirl seemed to have a strong opinion, stating that she both planned to break the glass ceiling (as Supers were a predominantly male profession) and would not settle down, at that time, in her firebrand ways as a married housewife. However, life had other plans for her as Mr. Incredible had managed to be so dazzling that she broke down and agreed to marry him. Shortly after their wedding, a chain reaction of events involving lawsuits results in Supers being outlawed by the U.S. government.

Since it became illegal to work as a Super, her goal of becoming a prominent superheroine was made a moot point. Elastigirl then changed to a more traditional role: becoming a housewife and devoting her effort to being a good wife and mother. This is particularly important for raising three children while living in witness protection and raising super-children in a normal world.

Helen adjusted skillfully to the anti-Super law by completely renouncing her career as Elastigirl, which spared her from being discovered and targeted by Syndrome, unlike her husband and Frozone who found it more difficult. In the privacy of the Parr residence, however, she still sometimes used her superpowers to aid her in housework and keep her three children under control. 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). While she can be a little irritable at times, she usually tries to remain composed, though she can get panicked or angry under pressure. She is a quick-witted, resourceful, talented, passionate, driven, and supportive woman.