Susie Tompkins was freckle-faced red/brown haired pony tailed 8 year old girl who was the niece of Lois Lane. She tended to hold an an overactive imagination where she often exaggerated tall tales and telling lies to adults with Susie often making mischief by making stories up.
Current Events (The New 52)
After the Flashpoint, a rebooted universe had Susie Tompkins being the niece of Lois Lane. She stayed with her aunt where Susie looked after some hamsters rescued by Superman from a killer that Lois had brought her. During her time there, a number of peculiar events began to be shown such as perfect geometric drawings made by Susie who claimed that the "spaceman" had taught her to draw them. Furthermore, she seemed to show some form of greater ability to understand the mental state of the hamsters in her care. Whilst taking Susie to see a movie, they met Adam Blake who informed them that Thompkins was actually a member of a race of post-humans known as Neo-Sapiens or Nutants. He claimed that he intended to take her from humanity as they were destined to inherit the Earth in the future as they were born ahead of their time. This led to a fight with Superman who sought to stop Blake from his actions though Adam managed to repel the Man of Steel's attacks until Susie used a mental attack to stop Captain Comet thus defeating him. She was later recruited by the 5th Dimensional Imp known as Vyndktvx where she was made a member of the Anti-Superman Army.
The character largely featured in Golden Age of Comics as the daughter of Lucille Tompkins with her last appearance being in 1955. During the Silver Age of Comics, the only sibling given to Lois Lane was Lucy Lane who tended to be single and childless. Susie was reintroduced during the Bronze Age of Comics when Superman and Lois Lane of Earth-2 were married. She made several appearances during the late 1970s and early 1980s.
Action Comics writer Grant Morrison reintroduced the character within The New 52 where she retained her origin of being Lois's niece with an overactive imagination.