Miraculous: The Adventures of The Brimstone Feline and the Rushing Ram

Lt. Rosetta Mason and her RIO, Christopher Walkmann have crashed landed their Naval Fighter jet in Paris after a horrifying incident in the North Sea. Ladybug, upon learning the duo possesses the USN's Hellcat and Ram Miraculouses, trains the duo, though Ladybug and her team aren't very good at teaching. (Revised the summary due to Character limits & Crossposted from AO3).