Lieutenant Nara is the Enterprise-D engineering officer supervising nacelle control who witnesses the suicide of Lieutenant Daniel Kwan at the start of Eye of the Beholder.
Nara appears in the seventh-season episode Eye of the Beholder. She is in charge of the nacelle control room when Kwan, a well-liked young officer on her staff, climbs up to the plasma stream and throws himself in before anyone can stop him.
In the investigation that follows she is questioned by Deanna Troi and Worf about Kwan's state of mind. She can offer no explanation: he had been his usual cheerful self and had shown no sign of distress.
The answer lies in an empathic echo left in the room eight years earlier during the ship's construction at Utopia Planitia, which overwhelmed Kwan and later draws Troi into a vivid hallucination of murder and jealousy.