All characters in Romeo can make divination posts using any means of divination appropriate for communication that they like. Pendulums give Yes/No answers, on a Ouiji Board words can be spelt, etc. Those in the upsidedown can communicate through spelling or Yes/No answers to the questions people in Romeo ask. if you have OOC questions about how this works, comment on one of the disappearance posts.
Wanda is using a Ouiji Board Wanda's Question 1: Is there anyone here listening?