A Starfleet lieutenant commander and science officer stationed on Deep Space 9 who becomes the second victim of the sniper Chu'lak in 2375.
Greta Vanderweg is one of the murder victims in the Deep Space Nine episode Field of Fire. A science officer on the station, she is found shot dead in her quarters shortly after the killing of the young pilot Hector Ilario, with no sign that anyone entered the room.
The weapon is a TR-116 projectile rifle fitted with a micro-transporter, which lets the killer fire through bulkheads from elsewhere on the station. Ezri Dax, who is investigating with the help of her murderous former host Joran, struggles to find anything that connects Vanderweg to Ilario.
The link turns out to be trivial: both kept pictures of laughing people in their quarters. That was enough for Chu'lak, a Vulcan traumatised by the loss of his ship.