It is expected that the two will hold autograph sessions throughout the duration of the convention. It is currently unknown whether there will be additional guests or J-fashion shows planned. More information will be revealed soon on the convention's official website.
Sakura-Con is an annual anime convention held in Seattle, WA, on or just before the Easter weekend. It attracted over 30,000 people in 2012, and is growing each year.
In the video below, Eir Aoi and Haruna Luna warmly greet Sakura-Con attendees: