Guild Wars 2

I was wondering if there is a valid and tested way to be able to use my legendary on another character of mine

Hi Ath,

As you can see here http://wiki.guildwars2.com/wiki/The_Bifrost (The bifrost just being an example) legendary weapons are soulbould on use, so once you have equipped them, there is no way to send them to another character.
Before being used, however, you can send them to any other character.

Hope this has been helpful to you.
Thanks for your understanding.