Miss Bianca is a Premium Box Tsum. She is a Limited Event Tsum and is not available from purchasing Premium Boxes outside of the event. She was first introduced in the Japan event Disney Story Books Classic Series II (March 2019) and the International Event Disney Storybooks Classics Series II (September 2019).
Miss Bianca will summon Bernard and will transform a nearby Miss Bianca to form a Bomb. Her base number is 20 and her base transform number is 1. Higher Skill levels reduce the number required.
Each Bernard Tsum Tsum that appears will count as a boy Tsum Tsum during missions that involve clearing such Tsum Tsum, even though Bernard is currently a non-playable Tsum Tsum.