K'Ehleyr

Worf's hookup

K'Ehleyr was a half-human/half-Klingon hybrid who served as the Federation ambassador to the Klingon Empire and mothered Alexander Rozhenko after mating with Worf. She was killed by Klingon High Councilor Duras when, during the Rites of Succession following the death of Klingon Chancellor K'mpec, she discovered the role of Duras' father in the Romulan attack on Khitomer.