Initializing Artist's Comments...
Sevagoth Deluxe has went through many phases of development. Originally we had planned to link Sevagoth Vanilla, Deluxe, and future Prime together in a chronological and lore-friendly order. As Sevagoth Vanilla is a decrepit Warframe who has deteriorated in the Void, revealing skeletal and mechanical details - so then Sevagoth Deluxe would have been the "complete" version of what Sevagoth may have once looked. With Sevagoth Prime (not featured) the original from the Orokin Era. "Complete" Sevagoth would be more creature-like leaning into his deep sea inspiration, while "Prime" Sevagoth would be leaning more into his regal captain themes.
However, this idea was scrapped as the team did not want to risk any deluxe cosmetic interfering with the lore, due to the historic backlash of Valkyr Prime.
Once the decision has been made to pivot officially towards a new direction, divorced from any canonical story, we went toward the cursed Grecian marine warrior theme.