Kestra Troi
Kestra Troi was a half-Betazoid, half-Human female, born in 2329 on the planet Betazed to Lwaxana and Ian Andrew Troi. Kestra was the older sister of Deanna Troi. Shortly after Deanna's birth in 2336, Kestra was picnicking by Lake El'nar with her family and their dog. When Lwaxana and Ian looked away for a second to tend to Deanna, the dog ran off and Kestra went after him. Kestra fell into the water and drowned.

Her loving parents were naturally devestated, but the memory of Kestra's accidental death was so traumatic to Lwaxana that she buried it deep inside instead of dealing with it, as she ultimately blamed herself for the ever-so-brief lapse in attention. She even destroyed everything that was a reminder of Kestra, including the personal journal entries she'd made during the years of Kestra's life, but Mr. Homn secreted away a picture of her in case Lwaxana wanted to remember her in the future.

Years later in dream sequences, the adult Deanna, now a counselor, helped Lwaxana come to terms that it had simply been a tragic accident, and she was not to blame. Lwaxana was forgiven by Kestra, and in turn herself. Only then did Lwaxana find peace from the tragedy. ()

When Lwaxana became pregnant in 2372, the thought of losing her child to the Tavnian culture made her depressed, stirring the pain of Kestra's death. She would later confide to Odo that the losses of her parents, sister, and husband did not compare to the loss of Kestra. () After marrying William Riker, Deanna would name their daughter Kestra Troi-Riker, after her. ()

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Betazoids
Humans
Hybrids