The principal female antagonist of the series, Laura has been Rin's main rival for the better part of over fifty years. An assassin by trade, she had been hired by Apos to kill Rin; but was unaware of her immortality until the case involving Kouki in 1990. Although fatally injured by Rin, Apos used a Time Fruit on her; although it did not regenerate the eye she lost to Rin in their fight.
Laura appears throughout the series, attacking Rin whenever she can; after Apos uses a Time Fruit on her, she becomes some kind of immortal cyborg. Apos betrays Laura in Episode Six by sending Angels after her during the fight with Rin; and she retaliates by leading Mimi and Mishio to Yggdrasil's root. When Apos is being absorbed into Yggdrasil, she asks Rin to take her Time Fruit and feed it to him so that he can feel her pain.
Laura's obsession to killing Rin over the years had taken to become a matter of pride to her, and she would try various means to accomplish that task. But in the end, she began to feel a bit of respect for her quarry as well.