I belong to Caustic -- return me if I wander!
Lace is time. She is the physical manifestation of the passing of minutes and hours and days, and her main purpose was to prove the saying "history will repeat itself" correct. Teaching was her main goal, to educate and inform people of each time period of the mistakes of their ancestors and vividly recall the consequences said mistakes led to. Unfortunately, as with Layla and Elian, Lace did not integrate into humanity as was hoped.
The creator's gift, the ability to see and know and learn directly from the past in a perfect and unbiased way, was mostly ignored. No queen wanted to know that the man she had married was destined to ruin her country and no general wanted to hear that his war was futile. Pride wasn't just a stumbling block, it was a mountain that the world fell at the feet of and Lace's power diminished among them all. Soon, she withdrew herself completely from humans.
Lace has the ability to exist in a different plane of existence than mortals altogether, but she's a bitter soul and has been known to wander earth in a plain human form, snickering at the stupidity around her that she surely could've avoided. But truly, Lace was created to teach and be accepted, and her rejection built steel walls around her heart. She is sarcastic, cynical and pessimistic, often letting her dark feelings override her own power to predict terrible futures when even she can't perfectly know what will happen.
This attitude caused her to be distant from Layla and Elian, with whom she had been intended to work with -- in fact she claims to downright despise them! Who better to create a fear of time itself than having death walking around, giving people a good glimpse of the inevitable, or even the beauty of life paraded about when so many had wasted their own? Much of the blame for humanity's hate of her, Lace will say, lays squarely on the shoulders of those two -- as if they also hadn't been rejected and reduced to mere phantoms.
This hatred doesn't stop Lace from occasionally visiting Aster, one of the few other beings with whom she gets along. Aster's temper is legendary but she can, at least, appreciate Lace's cynical nature and the two share similar gifts. Watching humans destroy themselves from on high in the Vaulted Courts is a pleasure for Lace to indulge in.