Hi Chris,
Thanks for the interest in our plugins. I can help out here.
The attendees are stored as custom post types so they use the posts and metaposts tables for the information. The post type is tribe_wooticket. The user creation is handled by the eCommerce if you have it setup that way and it is created in the WordPress usertables.
If a attendee purchases multiple tickets all the information is under their name and we currently do not have a feature to collect more attendee information besides the information collected at checkout. We are working on a feature to get more information, but it is not ready yet and I do not have a timeline for it.
Let me know if you have any follow up questions.
Thanks