She was...
...great as Data's daughter, Lal, in the episode "The Offspring" from the 3rd Season of TNG.
Loved this exchange between the two at the end:
Data: Lal. I am unable to correct the malfunction.
Lal: I know, Father.
Data: We must say goodbye now.
Lal: I feel...
Data: What do you feel, Lal?
Lal: ...I love you, Father.
Data: [after a pause] I wish I could feel it with you.
Lal: I will feel it for both of us.