What does the red circle mean for Bea!?

Usually this is a special ability circle which indicates the troop is ready for its special attack. For example, BK uses his iron fist & AQ fires exploding arrows when their circles are full. But what does Bea do when her circle is “full” or starts to blink? The circle shows up as soon as she picks her bees but I don’t notice her doing anything different afterwards. Am i missing any special skill that she has? There are a lot of things like this in the game that aren’t clear or self explanatory i guess?