Fanfic/magazine series: "Difference," by Theresa Holmes; Star Trek; print zine Fesarius 5 (1982).
Information by Pat Pflieger
Telepathic like all Delphians, Elanor MacPhail becomes the chief navigator on the Enterprise; she is accompanied by her Delphian singjoy, a tiny eight-legged, bat-winged creature resembling a little dragon which only she can control.
Elanor is descended from engineers and thinks -- and sometimes speaks -- in impenetrable Delphian Common -- which seems very like a thick Scots accent. She also is the ship's expert in several languages. She has many of the good ideas during the story, so many that Spock relies on her advice.
Mary Sue Page