Master Fu looked grave. "Using multiple Miraculous at once is a physical and mental strain that could break you, Marinette." "I don't have a choice," she insisted.
Marinette realized she couldn't win this as just Ladybug. She needed a plan that didn't rely on a single Miraculous. [S3E15] Kwami Buster
In the heat of the battle at the school, both Ladybug and Cat Noir found themselves in a precarious position. Kwami Buster’s vacuum was efficient, and it wasn’t long before she managed to suck Plagg right out of the air. Adrien, powerless without his partner, had to retreat. Shortly after, Tikki was nearly caught as well. Master Fu looked grave
: The conflict was driven by Professor Mendeleiev's desire for scientific validation. Marinette." "I don't have a choice