Elsa

Elsa is a Premium Box Tsum. For a limited time, while she was first introduced, she would be a musical Tsum and will play the song "Let It Go" during gameplay.

Information
Elsa Tsum has a unique skill where she will freeze the bottom layers of unfrozen Tsums which you can tap to create a large chain. Her base freeze radius is XS. Her max radius is XL.

Strategy
To get the most out of Elsa, wait for there to be no holes in between the Tsums, including any bubbles (or at least not many holes, as you want to use Elsa as many times as possible) and then use her skill. You will get a bubble with a bonus in it, such as Score+ or Coin+.