That's what real relationships are based on. Trust. Umbra has shown us a vast amount of trust, in giving us their name...in sharing their gear...they've gone so far out of their way to look after the Commune, and now, even after I am no longer a part of The Commune, they are here, helping.
Johnny couldn't trust anyone. Hana, in turn, couldn't trust anyone. I worry sometimes that I trust too easily, but...even when I am wrong about someone, do I regret it? Not really. I won't let paranoia change me.
The people who are worthy of your trust will prove themselves, when given the chance.