Lisa Oakwood, Luke Ainsworth's childhood friend, shared a deep bond with him during their youth. Driven by duty, bravery, and righteousness, she aspired to become a knight to protect others. Her personality reflected practicality, meticulous attention to detail, and a profound sense of responsibility, consistently prioritizing structure and logical choices.

She perished shielding Luke during an exploration of the demon Valbanill's cave. In her final act, she formed a Demonic Pact, sacrificing herself to birth a demon entity charged with protecting Luke indefinitely. This pact created a demon named Lisa, who inherited Lisa Oakwood's youthful appearance—blonde hair, violet eyes, and elven ears—and became Luke's live-in assistant.

Her sacrifice imprinted lasting guilt and grief upon Luke, who blamed his own actions for her demise. This fueled his dedication as a blacksmith and his protective stance toward the demon Lisa. Lisa Oakwood's legacy endured through the demon Lisa, whose presence and unwavering devotion to Luke stood as a perpetual reminder of her original's love and sacrifice.

Her character surfaces in flashbacks and the demon Lisa's reflections, serving as a catalyst for pivotal relationships and events in the narrative.