I'll respond to this one as it might not come up in the story.
Durai did know
Angel's father, but any interactions with him as a boy might have been a long time ago. Was he aware of who Angel was during during the first attack on
the tower? No. He never saw Angel face to face during the conflict, and even then he may not have made the connection. Who controlled the list of names at that point,
Scratch.
From 12:
DURAI
(holding down the receiver, to
Scratch)
Which one is this one, now?
Burt?
Ok, thank you, dear.
(to Burt)
Burt! Nice to meet you, finally, I
have heard so much about you.
When
Kalani relayed the names, he left out Tunudo. He may not have been aware of it at the time, but the information was only partial.
"Angel who
the Mallers and didn't tell anyone?" It's not apparent in the story WHEN he made the connection of Scratch,
Latch, and or Durai. But he definitely went to some lengths to NOT let on about it. In a scenario where trusting people is already very difficult, why add to it by declaring a past that might coincide with one of your enemies. He goes to great lengths to try and hide his name from the
others. If you listen closely to
Chapter 8 he gets very upset that his name is mentioned. Why? Because there's a lot behind a name...