La Mariquita

 was a past Miraculous holder, wielding the Ladybug Miraculous and transforming into a ladybug-themed superhero when Tikki inhabited them.

Abilities
If this past Ladybug Miraculous holder had the same powers as the current Ladybug (Marinette), she had enhanced abilities and the superpowers Lucky Charm and Miraculous Ladybug. She also had the yo-yo for a weapon.

Trivia

 * Thomas Astruc revealed the character on a tweet he posted for Feri's birthday.
 * Mariquita means "ladybug" in Spanish.

La Mariquita