Rapier represented the designation that Darth Maul assigned to a Duelist Elite droid, employed by him to hone his skills in lightsaber combat. Consistent with its designation, it was equipped with a steel rapier. Possessing a blaster-resistant durasteel chassis, it was also programmed with a diverse set of martial arts proficiencies, which it was capable of performing at velocities marginally exceeding those of Humans. Originally, it was built including an inhibitor that stopped it from fatally harming its opponent, however the Sith removed this. During 32.5 BBY, Maul, utilizing his lightsaber, severed one of its limbs and inflicted a wound to its abdomen while it was engaged in combat with him alongside three additional Duelist Elites, Chain, Cudgel, and Hachete, but the damage sustained was not irreparable.