I'll be playing as well, I plan on writing one or two of the Chainer brothers.
One is a bit older, (early 30's, widowed, no kids) and he has been called "insane" as he oversees most of Chainer's mining operations which includes slingshoting onto comets, mining them clean then escaping before they crumble and or collide with something.
The other is late 20's, the baby of the Chainer family and spends his time getting into trouble. Prefers to spend his time having fun before his family reel him in.
The other 2 chainer kids are NPCs, one the standing commander of Chainer's Navy/Fleet and the sister a noble woman who is actually a female Han Solo who owns the Space Station "Deadman's Port" that borders on Chainer Space and a local hub for Smugglers, Outlaws and the scum of the universe.