Well Qoocgo is a smuggler. So perhaps Erich needed some illegal medicine or perhaps Currr'Ipa needed some illegal droid parts or an illegal droid delivered?
Any character Tie-ins have to either know each other very well from missions, or is perhaps a one-time smuggling deal.
Qoocgo only has friends in the business sadly.
As for Aspa, I feel like I should know you simply because of your father. We'll either be friends or foes.