... He is very short.
*Warning- Crisis Core Spoiler*
But, some theorise that he is actually the degraded Genesis, from Crisis Core and that the two strangers who picked him up at the end are Loz and Yazoo
He fights with his "Souba", a double-bladed katana.
As he is made from the lifestream, which is why he can absorb Jenova's cells to turn into Sephiroth