Nova, the Twilight Maiden

The Shadowmaiden. 
The Twilight Lady. 

Rowena was not alone, in the creation of a reflection based on a misunderstanding of the Travelers' technology. But whereas her First Shard's fusion with a SHADE created the entity known as "Ivy," Leansethar's First Shard was touched with that twins' affinity for Matter, rather than Thought.

The being known as "Nova" would not attain a physical manifestation until the activation of Andahar's Engine. While every other living being in the Kingdom was burned beyond ashes, their spirits trapped across the Fusion Boundary in Andahar Onyx, that catastrophe was the key that freed Nova.

Nuwmont 6, 998 AC: What Was Heard From the Shadows

“Shhh!”

Aurora’s warning hiss quieted the already low murmur of our conversation around the sputtering fire. A gleam of red-gold light from her wrists banked the fire down to a dull red glimmer among the meager branches and brambles.

Her golden eyes narrowed, and the dark stones above the red gave off deep glimmers of purple light. Silva’s pale hand closed over her sister’s wrist.