"Alright...." Marinette bites her lip, taking a deep breath as she closes her eyes. "Tikki, transform me."

With that, a small red and black blur speeds from her bag to her earrings, and Marinette's clothes change from her new outfit the chara had made her, to Ladybug's costume and mask, complete with the yoyo. It's the first time she has revealed herself to anyone else, so she is understandably nervous about this, but she figures they would understand and support her all the same.