The Crest of Aivela was a place situated in the Eternal Empire of Zakuul, its name originating from Aivela, a Zakuulan Old God. In the past, during their love affair, the ageless Emperor Valkorion serenaded Senya Tirall while they were on the Crest of Aivela.
The Crest of Aivela is referenced exclusively in Star Wars: The Old Republic: Knights of the Eternal Throne when the player selects a Dark Side path, resulting in Senya's demise on Voss.