Originally Posted by
BananaPhone
Ahh there already is!
On page 163 of the Rogue Trader book there is 'Mind Link'. You basically form a telepathic connection between yourself and a number of willing participants equal to your willpower bonus (5 in Marcs case), allowing them all to talk instantaneously and secretly with each other. It's 200 exp and Bennosuke approved of it last OOC thread.
...but she's kinda spent enough exp on psychic stuff for now lol she really needs to focus on her skills and become a more well-rounded character.