Mara Sov ( appropriate services only )
Other ( planet vendor I guess, state it in the comments!)
I would not pledge loyalty to any one person. I'd be my own guardian, helping people out when they need it. In my ideal scenario, my guardian finds a nice sized ship, like maybe a salvaged fallen ketch. And just sit in orbit above earth, making supply runs to the tower and helping out when he can. Obviously picking up bounties and doing quests, running strikes and whatever else, but keeping his distance.