Everyone believed that Tony Stark was a man who never cared about anyone but himself. Which was nowhere near the truth. The only thing he cared more about was his sister, well, half-sister, Evangeline Margaret Stark, or as she was always introduced, Evangeline Howard.
Most people had never heard of Evangeline Stark. Most people didn't even know she existed. So at Stark Industries parties, she kept it that way.
Instead, she was introduced at Evangeline Howard, Tony Stark's head of Research and Development.
No one knew the truth. At nearly sixteen years old, she wasn't born by natural means.
Howard Stark's DNA had been infused with a random woman's egg, Lydia Jane. Then it was injected into her uterus, and nine months later, boom. A new Stark was born.
She was discovered as a Stark at seven months old. Lydia had died in a car accident, and since she had no listed next of kin, the baby's DNA was tested. Imagine the chief of staff's face when she realized that the baby was Howard Stark's daughter? Especially since he had died years before the baby was conceived.
Tony Stark, Howard's son, was immediately contacted. He ran the tests himself, but it was true. Tony had a seven month old half-sister.
Desperate to keep her out of the public eye, Tony paid off all who had come into contact with her, as well as those who had seen her hospital records. He chose her name, Evangeline, Margaret for Peggy Carter, Howard's old friend, and it took awhile for a last name. He couldn't choose Stark, that would be too obvious. So it became Howard.
With the help of his best friend, James Rhodes, Obdiah Stane, and Pepper Potts, young Evangeline Howard grew up normally. Well, as normally as a child can when she has a high IQ, and her brother is also a total genius.
Evangeline, more often called Evan, had an IQ rivaling her brother, and showed it clearly. The two seemed almost like twins. Both looked the same, with dark hair and brown eyes. Only Evan's fell in waves to her waist, and her brown eyes were a warmer, darker chocolate. Both shared the same sarcastic attitude, and loved to correct others. But where Tony was narcissistic, Evan was polite and kind, always helping others.
By just looking at her, she seemed completely normal. In fact, she was actually deaf. At two years, she became very sick, and as a result, she could no longer hear. So Tony made her special hearing aids, nearly invisible to the naked eye, and also completely hidden by her long brown hair. She also learned to sign, just in case, as did Tony, Pepper, Happy, Rhodey, and Obidiah. And she was pretty sure both Clint and Mat knew how to sign, or at least understand what she was trying to say.
There was also another thing, her mother, Lydia Jane, was from Asgard, a full-blooded Asgardian. So being half-human, and half-Asgardian, Evan could control the elements. Air, water, earth, fire, and also a few smaller things, such as plants.
So yes, Evangeline Margaret Stark was a very not-normal girl.