Princess Leia is a Premium Box Tsum. She is a Limited Time Event Tsum that was given as an award during the Japan Star Wars Event (Dec/Jan 2015) and the International Star Wars Event (May/Jun 2016). She is not obtainable through purchasing Premium Boxes outside of the event.
Princess Leia Tsum will clear multiple small areas of Tsums with her blaster. Her base clear size is SS in the Japanese version and XS in the International version.
Use her skill immediately after she fills up. Tsums will continue to fall and fill the screen as she prepares her blaster, so you're not wasting time waiting for that before using her skill.
Skill Level Edit
|Radius Size (JP)||Radius Size (Intl)||Skill Upgrade|
|1||SS Size||XS Size||1|
|2||S Size||S Size||1|
|3||M Size||M Size||1|
|4||L Size||L Size||1|
|5||LL Size||XL Size||1|
|6||3L Size||XXL Size||1|