[quote=@Legion02]
[@Quinntessential] Okay I got this idea of a little brother of Dom who kind of looked up to him but felt left behind when Dom entered the army.
[/quote]

I was kinda thinking that Dom would be an only child.  I think if you wanted to have some kind of antagonistic relationship with him, it could be an old rival from High School...or just someone rich and snobby enough to find Dom's lifestyle insulting.  He 'gave up' his wealth to serve with the common folk, after all.  Forgetfulness is the only reason he has any money. :P  (at least that's the rumormill)