Origin
Vydija is most likely created by the Red Goddess from a soul of her priestesses like other succubi in Hell.
Major Story Arcs
Vydija is one of the many gladiators fighting in the Hell’s arena for the glory of the Red Goddess. Vydija has befriended a Chort blacksmith Kethar. Together they took part in the grand finals, and Vydija won. Kethar also survived barely, and promised to make Vydija an armor fit for queen.
In Other Media
Agony

Vydija made her first appearance in the 2018 Agony game, where she had slightly different look with her blonde hair. She stalked the player character, Nimrod, and interacted with him in the cinematics. However she gained popularity amongst the players and was made playable in the later update called “Succubus mode” in the Unrated version of the game.
Succubus

Vydija’s popularity kept growing and she received her own game called Succubus in 2021. Now the main playable character in a more action oriented game.
Agony: Lords of Hell

Vydija is also shown in the promotional material of Agony: Lords of Hell as a playable hero unit.