ᴄᴀʀʀʏɪɴɢ ᴀ sᴡᴏʀᴅ ʙᴜᴛ ɴᴏᴛ ᴀ ɴᴀᴍᴇ, ᴀ Fɪɢᴜʀᴇ ʀᴜɴs ᴀᴄʀᴏss ᴛʜᴇ ʙʀɪᴅɢᴇ ʙᴇᴛᴡᴇᴇɴ ᴛʜᴇ ʜᴇᴀᴠᴇɴs ᴀɴᴅ ᴇᴀʀᴛʜ.
Oh, ᴀ ᴍᴇssᴇɴɢᴇʀ ᴏғ ᴛʜᴇ ᴅᴇɪᴛʏ ʜᴀs ᴄᴏᴍᴇ!
The way her eyes move give the impression Soh isn't visible at all times.
It also explains why she always gets spooked by Soh.
If you observe her outside the tent, you'll see her play with invisible things in the air. Spirits?