The space marines all call each other brother, but they would also die for each other without hesitation. In my humble opinion, brotherhood is a bond too strong and sacred to be used loosely. Yes I just justified my opinion with warhammer sci-fi. Welcome to my pubkey. 

 npubkey* 💜💜💜🤭 #nostr wins 

 Just finished the Space Marine I and II games. Titus is an absolute badass.