Kaede has literally no idea because she is holding onto Greed with every bit of strength in her tiny body, legs and arms wrapped around him in a death grip. Her eyes are tightly closed and buried in against his shoulder. And she's not letting go.

In fact, all he'll get is a little whimper of sound and if he looks down, he'll see that the Shield is up, and covering any available inch of skin.

She's terrified, and her power is activating for her regardless of how she feels about it.