1x16 - Magic Knight Rayearth

Zagato informs Princess Emeraude that he is using mind control to send one of the Princess' skilled swordsmen/royal guard to kill the girls. She begs Zagato to stop, but he doesn't listen. With the girls, they are traveling to the volcano-like shrine to revive Hikaru's machine, only to be attacked by a big flying bird. They try to fight it off with their swords, but it's no use. It then takes a hold of Umi and flies off. Fuu tries to give Umi her sword, but Umi's sword turns into water while Fuu grabbed it. Fuu only has one choice, and throws her own sword to Umi. Umi catches it, but is too heavy. She tries to hold onto it, but drops it instead. The bird continues to fly, and a guy kills the bird. Hikaru and Fuu catches Umi, and she comments how heavy Fuu's sword is. Fuu then holds it, and it's light as a feather. They then soon figure out that the swords, was made specially for each other. Anyone else who tries to use it (including each other) it won't let them. Umi then wan