as read they take up a slot in your lobby so does that mean they are usable by all of your characters or just locked to just one
Unsummon your companion
In the character lobby screen, detach your companion from your current character. Then you are able to attach the companion to any other char.
Good if you wanna lv some of your nub alts.
you are awesome 
thank you for this info know to get the one i want an learn how to unattach it