Dawn Allen is the daughter of Barry Allen and Iris West-Allen. She is the twin sister of Don Allen.
Dawn is a Caucasian toddler with large green eyes and short, brownish blond hair. She is chubby, and wears a purple dress with a necklace.
Iris found out she was pregnant in the morning, but decided to hold off telling her husband until the evening, when they'd have privacy, after celebrating the Garrick's wedding anniversary.
The sudden arrival of
Impulse spoiled the surprise. However, Iris was shocked to learn she was pregnant with not one child, but two, a boy and a girl he referred to as Aunt Dawn.
She and her brother were playing as their mother watched a television report. As soon as they heard the doorbell they ran to answer it. However, Bart immediately caught them. As more and more guests arrived, Dawn played with the toddlers of the other heroes.
In the comics, Don and Dawn Allen, also known as the Tornado Twins, are the children of Barry Allen and Iris West-Allen. Dawn Allen was the mother of Legion of Super-Heroes member XS (Jenni Ognats).