Dungeons & Dragonwarriors - Who is That?

Okay. A bit of a change of pace, so bear with me on this one.

In 1986, Out of the Shadows - the fourth in the Dragonwarriors series - hits the shelves and introduces us to the Assassin Profession.

In illustrations accompanying one of the included adventures -'The One-Eyed God'- this faceless character turns up twice. Apart from the armoured figure on the left (being the exception to prove the rule), there are no other characters illustrated in this fashion throughout the 4 books so far.

 

Because this is book 4, I think the character is an Assassin: staff and dagger/short sword are their speciality weapons, and they prefer light or no armour.

Other special abilities of the Assassin include Climbing, with added acrobatics: 

An Assassin can leap up to scale any obstacle below 3m in height, given at least 5m as a run-up. This is executed as a single jumping somersault - spectacular, though it can lead to problems if the drop on the other side is more than 6m!

Assassins can fall up to 6m without sustaining injury. 

- Out of the Shadows, p.19-20

So the boots are off for some jumping, leaping or tightrope walking.

Though we can't definitively determine gender or ethnicity from the illustrations, I think that this character is Diana the Acrobat from the Dungeons & Dragons cartoon (1983-1985).

The outfit is not 100%, but I think that could be for the same reason the face is hidden - so as not to poke the D&D litigation monster. Alternatively, Bob Harvey might just have thought that her original get-up wasn't suitable for the frosty wilds of Algandy.

Why? 

Is this an Easter egg or a coincidence? Does anyone know either way, or even think this is plausible?