The Nimue were a member race of the Interstellar Alliance.
In 2266, while using her relationship with Ambassador Vir Cotto on Babylon 5 as cover, Mariel managed to seduce the Nimue undersecretary of Defence, gaining an open invitation to the Nimue homeworld with the promise of gaining an insight into the Nimue Department of War.
Mariel was in fact working for the Centauri Republic's Division of Public Works; an espionage organisation run from the Development Office under the Ministry of Internal Security and tasked with gathering intelligence on the Alliance.
|Arnassian Caretakers Delgashi Divloda Enphili Faranian Fen Golian Hive Mind Bacteria Kaitay Kinbotal Kulan's race Kurlin Lorkan Lumati Merla Mind-altering aliens Mipasian Moradi N'Grath's Race Na'ka'leen Nimue Norsai Orion Ralgan Riar Scout fleet race Servitors Sh'lassen Shoggren Soom Soul Hunter Streib Tak'cha Tikar Tokati Tzillari Vindrizi Vinzini Visitors Wychad|
|Shadow Servant Races|
|Keeper Shadow Surgeons Sleeper Soldier of Darkness Wurt|
|Extinct and Nearly-Extinct Races|
|Belan's race Ceti Daltron Dureena's race Ikarran Original Lorkan Taratimude Varn's Race Xon|
|Alacan Cauralline Cthulhin Deneth Froon Krish Mitoc Morellian Thrantallil Throxtil T'llin Tuchanq Ylinn|