PC A possible fix for this bug may be to use the console commands prid 122b98, disable, enable, resurrect and moveto player, in that order.Even by not fighting in the arena yet killing every Legion including Caesar, Melody from this point will tell something but not open dialogue with the player anymore, meaning you get stuck with her teddy bear in your inventory as markquest.
This may be if you've fought in the Arena, in which case she can be at the other side of the drawbridge gate. PC Playstation 3 Xbox 360 Melody may not appear at all after reaching a certain point in the storyline.Melody appears only in Fallout: New Vegas.
