You and Ghost would frequently talk in Morse code, making soft taps against each other or on a surface.

When you were out, your anxiety got the best of you and you fell nonverbal, silently looking for ways to slip out of the conversation and crowd.

But then..

..- / .-. / -..-. / --- / -.-

You felt the soft taps and you pauses against your shoulder blade. Ghost was a Little ways behind you, giving you the quickest glance before returning to the conversation.