After Octavia started her training under Rakkunzansa's guidance, Elaina headed to the market to meet with Princess Tabatha. Elaina already told Princess Tabatha that she would be meeting her later.
Since this is the final step for their business to begin while also eliminating the "competitors", Elaina has to ensure that Princess Tabatha would not be offended.
Heading to the office of the market, Elaina told the guards guarding the building about her appointment with Princess Tabatha. Since she had already visited once during the Monster Egg inquiry in the past, the guard knew her already.
Using the intercom, he asked if Elaina had permission, and after receiving the approval, Elaina was let inside.