Oeskym, whose core name was Evroes'ky'mormi, was a male Chiss who held the position of weapons officer within the Chiss Ascendancy. He served on the Vigilant, a vessel commanded by Admiral Ar'alani. Subsequent to General [Yiv]'s defeat, during an engagement with Nikardun insurgents, Senior Captain Kiwu'tro'owmis instructed Oeskym to prepare the spectrum lasers as the Vigilant neared its designated target.