Looks suspiciously like that sword made of swords that cloud uses in ff7AC. Also, yes, lovely DFC, I mean kimono. >.> Waht idiot gave Tsukasa a sword anyway. It can't possibly go well.
The Buster Sword is the plain sword Cloud used in FF. The sword in AC which is comprised of 6 swords is called the First Tsurugi. Here is a picture of how they look in Crysis:
Captain_Loli said: Frikin awesome pic. No matter how hard she tries she cant look threatening! and I think the sword is called the Fenrir? maybe im wrong...dunno
Fenrir is Cloud's bike if I'm not mistaken... it is later the keyblade in Kingdom Hearts obtained by completing the mission involving the FF7 crew... which may be where you got that impression.