Kalaya was slightly laughing when Jen cast the spell. She quickly flicked her wand and said "Protego". She was a moment to slow though and her wand flew out of her hand right after she had casted the spell.
She picked up her wand and grinned at Jen. "Nice job," she said right before getting back into stance. With a flick of her wrist she said quietly, "Expelliarmus." She waited to see what would happen, never letting down her guard.