That's a mystery. Why all of them could hear him when he is only bound by familiar with mc hmmm...
I HATE people who mock and hate artists for taking breaks because they are sick. I wish y'all get sick instead and never recover. 
Comment by RiriSaves on I Started A New Life After Being Kicked Out Of The Hero Party - Chapter 27
1 Reply
@RiriSaves Literal power of friendship here. They considered themselves his comrades to the extent that it formed a connection between them, so much so that they ended up sharing the telepathy skill. What's weird is that it activated before a contract was even formed properly.