Time Weaver (A Stitch in Time)
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A Time Weaver was the sister of Gretel and Ethel. Her and Ethel were at constant odds with Gretel as they continually tried to destroy the fabric of reality, which Gretel would put an end to.
The Twelfth Doctor accidentally landed his TARDIS on her, which caused Ethel to seek revenge on the Time Lord. (COMIC: A Stitch in Time)
