Lucia Kim was born in 1769 and is the elder of the two saints who share this name. She is remembered as having a hunched back, and though her life was far from comfortable, she treasured and kept her faith.

When she was arrested in the Gihae persecution of 1839, she was already past seventy, so she was spared corporal punishment, yet through repeated and cunning interrogation she did not deny her faith. After a long imprisonment and much suffering, she died in prison in September 1839, receiving the crown of martyrdom.