This item is only available during The Battle for Broken Shore as Alliance. It is used to acquire Alaina's Bonnet.
To get it, you must loot Ashes of a Fallen Crusader during The Battle for the Broken Shore. This is easiest to do during stage 7 of the scenario when the mobs have despawned.
Go to Alaina Hearthsong at Eastvale Logging Camp in Elwynn Forest. Talk to her, then leave the house and return to where she was. Alaina's Belongings will be there and you can now loot the bonnet.
The interesting thing is the disappearance of not just Alaina, but the two children as well. I thought at first that the family moved out of the house, seeing as Alaina took her husband's death at the Broken Shore badly and there would only be painful reminders in the home. You pointed out to me, however, that using "/target Alaina" will target Alaina Hearthsong... dead. It's possible that she committed suicide, but there is no visible body or other indications of what may have taken place. I personally believe that, as despondent as she was, she only moved out with her children. Blizzard does make use of 'bunnies' to trigger spells or otherwise provide a mark for the game client to use as an indication to do/show something. After returning the charred locket, the player does not see her or the children anymore. How does the game know to do this? With the hidden, 'dead' NPC.Ok, nope. Looks like it is an environment bug. Some players are able to correct it by relogging (did not work for me) but I used Whole-Body Shrinka' to drastically change my camera's height. I was then able to see her corpse by clipping partly through the bed.Dang it.