Her name is Evangeline Whedon. Also known as "Vange", this powerful female mutant was known as the X-Men's lawyer in the Mutant Rights Coalition. Created by writers Chris Clairemont and Salvadore Larocca, the fictional character Vange first appeared in X-Men #21. Her storyline centered on her youth as a very successful prosecutor until authorities found out she was a mutant. Once found out, she was stripped of her title from the bar and evicted from her apartment. Her husband would eventually leave her. Nevertheless, as a powerful attorney, she could have easily helped much of the X-Men in the area of family law as many mutants ran away from home, taking up residence in Professor X's mansion.
A powerful mutant heroine, Vange is a metamorph who can change into various forms when she comes in contact with blood. Her most powerful transition comes in the form of a giant flying red dragon, a form she can change into whenever she wants. As a dragon, she can fly and assume all of the powers of a giant fantasy dragon. In several issues she helped some of the X-Men with legal affairs, but could have been very useful in family law. As a prosecutor, she was instrumental in the court consideration of the Mutant Registration Act, a law that forced all mutants to register and be recognized by the human controlled state government.
As an extremely experienced lawyer, it is reasonable to assume that Vange had some experience with family law. If this is the case, writers could have easily had her help with the orphanage and family battles that would occur with many of the younger children that took up residence in the Xavier Institute, although many of their families did not wish them to come back home. Many human families in the X-Men Universe abandoned or disowned their children upon finding out they were mutants.
Throughout the 80s and 90s, Vange would help several X-Men out of custody while protesting against various mutant incarcerations with the Mutant Rights Coalition. At one point, Vange succeeded in removing an anti-mutant terrorist from custody and into probation, making him her assistant as he was a brilliant, yet misguided, political scientist with some legal experience. By X-Men Generation Hope #8, she would act as the lawyer for fellow mutant, Teon, during a custody battle between him and his parents. This would be the only issue in which her character was seen practicing family law.
Considered an extreme national security threat by the US government, it was later revealed that Vange kept her powers after the human government "decimated" the mutant population of their powers. Nevertheless, she is still a lawyer for the X-Men and will shapeshift into a dragon any time she comes in contact with blood. With a gothic look similar to the main character in The Girl with the Dragon Tattoo, Vange keeps a unique style and charisma as a former prosecutor for the state.