Rebecca "Becky" Langstrom is the daughter of Francine and Kirk Langstrom, the scientist turned criminal also known as Man-Bat. She also has a younger brother named Aaron. Eventually, the whole Langstrom family was transformed into "Man-Bats" by the serum of Bat Gland Extract created by her father. Rebecca Langstrom was created by Bob Rozakis and Michael Golden, first appearing in Batman Family #17 (1978).
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