According to ponytail (Billy

), Ham spoke in an old-fashioned way and was pretty stoic. The kind of guy you'd associate with "samurai" and "bushido".
A bit of a weird guy, but somewhat like himself, which is why they got along pretty well.
Also because they're both the sort to walk only the paths they believe in.
Also, Billy's great grandfather was Japanese, which makes him one-eighth Japanese.
Setsuna's wish is to become as close as possible to the O Gundam.
Sergei has a son named Andrei, who's older than Soma.
The orbital elevator thing: Sergei and Allelujah did not talk. Allelujah never opened a channel and was just talking to himself when he "replied" to Sergei.
Allelujah's past: Lots of kids in a small ship, only enough oxygen for one.They started killing each other. "Kill me, Allelujah. And live, for Marie." Allelujah was both smiling and crying as he pulled the trigger.
Lockon's past: Lockon was buried in the rubble along with the rest of his family. It was a miracle that they got him out.
Setsuna pretending to be a civillian is an official CB thing ("Plan C")