Judging from the screencaps, cover and plot delivered on cover Dana Delicious isn't in this film.
see the scenes here also
Dana (cover credits) should be the masked brunette from the last scene
Pic of Dana from inflagranti-website:
Joana (cover credits) should be the masked skinny blonde from the first and last scene.
At Inflagranti-website she seems to be credited as Dea.
And she seems to be a real life couple with her male partner in the scene.
Their personal website (with enhanced breasts)
Report from German TV about them (Min 0:00-4:00 and 7:00-9:50
Cap from Inflagranti website: (maybe Schwarze Flamme 27)
Additional:
Pic of Sira from Inlagranti-Website:
