“But you will be more, as well.  You will be a symbol.  Men will commit great acts of bravery and sacrifice, for just the hope of glimpsing your face.  You will inspire them.  And I give you my word, girl, if you do this, one day, many ages from now, when your service is finished - you will join your lost love there, in Paradise.  This is your calling Brunhilde of Wrlstead Arms, if you would have it -

You will be my Valkyrie.”

Valkyrie from Secret Avengers