The fact that the water witch must be physically next to Oglethorpe when she haunts him once a year, regardless of his location, is important for several reasons:
1. **Symbolism**: This proximity requirement symbolizes a deep connection or unfinished business between Oglethorpe and the water witch. It suggests that their relationship or interaction holds significance beyond just a haunting.
2. **Power Dynamics**: The need for physical closeness could indicate a power play or a form of control exercised by the water witch over Oglethorpe. It highlights her ability to reach him wherever he is, emphasizing her influence over him.
3. **Consistency**: The annual visitation at close range suggests a pattern or ritual that has been established over time. This consistency could point towards a recurring event or a tradition that must be upheld for a specific purpose.
Understanding this requirement adds depth to the story, revealing insights into the characters, their relationship dynamics, and the underlying themes of the haunting.