Two Become One

Two Become One (めぐりあう二人) is a keychain for Sora's Keyblade that is found in Kingdom Hearts II Final Mix, and a form of Roxas's Keyblade that is found in Kingdom Hearts 358/2 Days. In Kingdom Hearts II, it is obtained by defeating Roxas at Memory's Skyscraper. Two Become One represents Roxas, a fact borne out by its obtainment, appearance, and ability, Light & Dark, which causes the activation of any Drive form to put Sora in either Anti or Final Form. In Kingdom Hearts 358/2 Days, Roxas can use this weapon once you beat the game and buy Zero Gear from the moogle shop and equip 2 ability panels to it.

Appearance
Two Become One is one of the more sword-like Keyblades, possesing a notched blade with a noticeably sharp edge. Its color scheme is derived from a fusion of Roxas's Oathkeeper and Oblivion keychains, and the handle is composed of the same checkerboard pattern on Roxas's wristband. The Keyblade's design is also covered with references to Roxas's Nobody nature; the usual Nobody thorns make up the teeth and rainguard, the chain links are heavily stylized versions of the Nobody Emblem, and the full Nobody Emblem adorns the hilt. The token itself is Roxas's Nobody-thorn charm.