Spirit is the long lost sister of Grace Reinfeld. Due to the differing lifestyles each has lived Spirit gained darker skin and lighter hair due to constantly being out in sunlight.
At around 12 years of age Spirit was sent to the Team Rocket Academy to follow in her parents footsteps. While there she befriended her sister Grace a few weeks upon her arrival. The connection was not known to them until after they reunited after a year of traveling around the world.