Instructions
Play the game until you have access to your own guild. This is where you are able to check the status of your party members. You get your guild after presenting an "emperium" to the commander at the "Order Of Knights."
Select the character that you want to get to "friend" status and add him to your party.
Perform missions and kill monsters with the character as an active member of your party.
Return to your guild after doing at least two missions, then select the "Status" option. The character should be listed as "Friend." If the character's status is still listed as "Comrade," perform another mission or two for her to become a friend.