We're just the best pair of best friends you'll find in the world (either real or fictional, although Will and Jem from the The Infernal Devices might just give us a run for our money).  We have these really creepy yet awesome mind links where 3/4 of the time we're thinking the same exact thing.  We're closer than sisters, and we pick on each other like we are sisters.   

But otherwise, we're just known as Spock and Kirk.

Live long and prosper.