They've all had words for her. Spirit, witch, lemure. There are whispers that she is a curse from the gods themselves. She welcomes them but none will speak them to her face and Marceline continues to offer too sharp smiles and aloof behavior until someone else had the courage.

"I never play tricks," she replies, face innocent. "Not on my allies. No glue either."

If she's gluing swords to scabbards, she'll use her powers.