Sakura Rokujo

One of the survivors of the Machida massacre, she was the woman haunting Ranmaru's dreams of his parents and neighbors being killed by a Phantom demon. Working in the Tokko division in the Shibuya prescient, she handles a broadsword in dispatching the Human Face larvae zombies. Her symbiont tattoo is on her right shoulder. It is also hinted that she may have feelings for Ranmaru when she kissed him before she went into his psyche in order to help save him from being possessed.

Later on, she is forced to face her own brother when symbionts inside of him have possessed him and turned him into evil.

(Source: Wikipedia)