G.

G. was Giotto's childhood friend. He assisted Giotto in forming a vigilante group that evolved into the core of the Vongola Famiglia. He bears a physical resemblance to Gokudera, including their shared smoking habit, and sports a tattoo on the right side of his face. Initially, he wielded a Gun, treating it as an extension of himself much like Gokudera's Dynamite, but later switched to a Bow bestowed upon him by Giotto whenever he acted on behalf of the Vongola. It has been implied that his relationship with Giotto was closer than that of the other Guardians, significantly closer than the current bond between Tsuna and Gokudera.
Weapon and Abilities:
G. Archery : G. Archery is a bow constructed with a bone structure, featuring a body embedded with an "I" and covered in Storm Flames. The string used to launch arrows is also covered in Storm Flames. It launches Storm Flames with greater power.