Elendira the Crimsonnail

Elendira the Crimsonnail is referred as the lost thirteenth in the manga.

Biography
Elendira the Crimson Nail is a manga only character who appears at the end of volume 5. She is considered the most powerful of the Gung-Ho Guns, referred to as "Lost Number Thirteen" by Wolfwood. Elendira shoots giant red nails from a large briefcase that transforms into a crossbow, with preternatural force and speed. She is a transsexual, and normally wears feminine clothing and a pillbox hat. However, underneath her outer garments she also wears restraining armour, and after disabling it is able to move at an even faster speed. Elendira is jealous of Legato Bluesummers, as he is not part of the Guns, suggesting that he is more important to Millions Knives. Despite this jealousy it is clear that she is just as loyal to Knives as Legato. At the end of volume 7, she along with Legato, Chapel, Livio, and Zazie the Beast board the plant-absorbing airship the "Ark" and cruise about planet Gunsmoke destroying human civilization. Elendira acts as a sort of "gun" on board the ship, using her briefcase to shoot down missiles that are aimed at the Ark and in one case dispatching several attacking airships to protect Knives. In the final battles, she fights with Livio The Double Fang and Razlo The Tri-Punisher Of Death, who kills her.

Edited to amend masculine pronouns to feminine. Elendira may be male, but she is a woman. Even Wolfwood says it, after she glares at him.