Portia was entirely caught off guard when the peaceful quiet of her little walk was disturbed when something cold and wet exploded on her shoulder, splattering snow onto her hair and neck and leaving behind a stinging sensation. So surprised was she that she let out a startled yelp, which then led to her blushing at how silly she must have sounded.
Well, that was no matter. Portia decided to determine the source of the snowball assault and as she wiped the snow from her cloak, she turned to investigate. She quickly noticed the wall of snow. Her first instinct was to sigh and trudge forward without paying whoever had tossed it any mind but she paused, realizing that she had no reason to do that. With an amused smile, she ducked down, hastily scooping a pile of snow into a very large snowball. She was glad for her gloves as she did, but for the moment she wasn't really thinking about the cold. Once the snowball was assembled, she took out her wand, levitating the sizable orb over the wall of snow where she estimated her attacker to be and then charming it to explode and shower snow on the people below.
Portia had no idea if she had actually gotten anyone with her little attack but she found herself stifling a giggle all the same.