Seeking
While most people are unable to separate their souls from their body, a Seeker is someone who can do this. This ability allows them to essentially be in two places at once.
While learning to master their power, a seeker will need to be in a relaxed state (usually lying or sitting down with their eyes closed). However, a more skilled seeker can use their power while going about their normal day-- people might not even realize that they are using their power.
While a seeker is using their power, their separated soul will appear as replica of their body only translucent and with a more indigo hue. However, non seekers are unable to see this.
While a seeker is using their power, their soul is unable to interact with anything or anyone. They can speak, however non speakers will be unable to hear them.