Edward Hagler

From Memory Alpha, the free Star Trek reference

Lieutenant Edward Hagler was a Starfleet officer and crewmember aboard the USS Enterprise-D in 2369. His quarters were on Deck 9, section 17, room 1947.

Although Worf states Hagler's quarters to be on Deck 9 Section 17, Crusher later calls for a plasma infusion unit to Deck 9 Section 19, even when she was directly outside his quarters.

Hagler was one of several officers abducted by the solanogen-based lifeforms and subjected to bizarre medical experimentation. One such procedure caused his blood to transform into a liquid polymer. The alterations were irreversible, and Hagler died shortly after being returned to the Enterprise. (TNG: "Schisms")

Hagler was played by Tyce Bune.

According to the non-canon comic book "Gateway", his sister was the captain of the USS Hornet.