Koei-Tecmo has recently released a trailer showing off how Fi, from Skyward Sword, will test her mettle against enemy armies (and no, Fi does not talk the enemy to death).  Most of Fi’s attacks consist of twirling, damaging enemies close to her.  After a few combos, Fi’s range increases significantly.  Fi will take on her Goddess Sword form when she activates her Special (Musou) attack.

Unlike the other trailers, Fi’s trailer does not seem to hint at any alternate forms.  Whether or not this is the case remains to be seen.