Sensational Siblings Stymie Stellar Stars

Baran and Selinda Flinders were a pair of siblings on Earth-One, each born a mutant with superhuman abilities manifested during their adolscence. Born and living their early lives in Australia, these powers become well known amongst their community, causing alienation with other children and ostracization with adults. When torments, they each used their powers to strike back at youths who torment them.

The brother, Baran, possessed immeasurable super strength in additional to virtual invulnerability, due to his particularly dense body mass. As a side effect of this condition, he appears to be mentally shunted and needs his sister to emotionally ground him. As for the sister, Selinda, she possesses the ability to transmute elements in her immediate vicinity from one substance into another. However, she is limited as the effects of her power are temporary, and have also manifested in her emotionally volatile personality.

Due to fears from the community towards their children, and the vengeful attitude the siblings displayed toward their neighors as a result, the Flinders' parents brought the pair into the care of noted genetic scientist Dr. Helga Jace. Jace attempted to teach the youths moral principles to govern their use of there abilities. However, instead of applying these, Selinda and Baran decided to become supervillains.

As young adults, Baran adopted the alter ego of Mammoth, and Selinda the alias of Shimmer. Their escapades brought them to the attention of Doctor Light, who sought to assemble the Fearsome Five to battle Starfire and her fellow New Teen Titans. There they followed team leader and mind-master, Psimon.

On Earth-Two, another pair of siblings had been adopted into the wealthy Pemberton family, who sought to provide companionship for their only son Sylvester. The parents, John and Gloria, believed their son had emotional problems as a result and thus left himself prone to self-injury. In reality, Sylvester was secretly the Star-Spangled Kid who... along with family chaffeur and mechanic Pat Dugan as the Stripesy... were members of the Law's Legionnaires.

Breezy was the first to be adopted, having saved the life of Sylvester which endeared him to the elder Pembertons. Shortly thereafter, the lad discovered that his new step-brother was a masked superhero, and sought to join he and Pat on their adventures. As he was older, although diminutive compared to Sylvester, Breezy only lived with the Pembertons for a few years before moving out. Breezy would later have a son, Arthur, who after his death would become the villianous leader of Strike Force who battled Star-Spangled Kid and the Justice Society.

Merry was adopted a few years later, and after discovering Sylvester and Pat's secret alter egos, joined them as the superheroine known as Gimmick Girl. She would continue her crimefighting after the pair disappeared for decades during the last adventure of the Legionnaires. Still later, Merry met and fell in love with the mind-master Brain Wave, aka Henry King. Together they wed and sired a son who would become a superheroic Brain Wave Junior, who would battle the superstrong Brain Wave image, created by Henry Senior. This red haired faux-foe of Sylvester took the place of now deceased red haired Breezy, now that King was a brother-in-law of Merry's brother.