Servant, Companion
A leader is always together with their servant. The servant is their constant companion, always following close behind the leader, offering them hot towels and bottled water.
Try to picture the servant without the leader... you can't! The servant and the leader are always together.
きょう
とも, そな
None
Once a year, when the servant wants to go home to きょうと, the leader follows. The servant isn't just there for the leader, they're companions, they support each other at all times. Even if that means heading home to きょうと to see the fam.
Picture the servant enjoying tea and cherry blossoms in きょうと with their family as the leader sits patiently off to the side. What a good relationship these two have!