[DC and Marvel] An Unconventional Villainess

[The thorns on a bad woman's heart will help her find the man willing to go through fire and water for her.]

The not-so-serious blurb:

Back when the boss and the eldest son were just starting out, they encountered their first truly "tricky" enemies:

twin sisters who pretended to be each other, took on each other's identities, and even faked one sister's death to escape.

Using misdirection and the tricks of hiding in plain sight, they toyed with the two energetic young heroes as if they were in the palm of their hands.

On the rooftop of a high-rise, after her identity was exposed, the younger sister, who had been acting all along, jumped from the building.

The flying robin failed to catch her.

All he remembered was the girl's brazen, triumphant laughter, and the way she stared at him with open provocation and malice. Then, in a sudden gust of wind, she vanished.

Ten years later, Dick Grayson had become an ordinary cop in Bludhaven. While out on a routine patrol with his partner, he turned his head and saw her sitting in a car as it flashed past.

Theme: Love and hate endure just as long.