KATIE BELL

Chaser for the Griffindor Quidditch Team and one year older than Harry, Katie is also a member of the D.A. In HBP Katie falls prey to the spells of the dark arts while at the Three Brooksticks in Hogsmeade… No, her Butterbeer wasn’t spiked. 

 KINGSLEY SHACKLEBOLT

I like this guy's name.  Who better to catch dark wizards than an auror who can put them in shackles and bolt the lock... and hopefully throw away the key?   His first name also denotes someone with the authority to do this, someone with authority and power -- a king.  I'm not sure what greater purpose Kingsley will have but I'm sure he's a powerful auror and that in and of itself could be a royal pain to the Death Eaters.  Could he be the DADA teacher in the seventh HP book?

KREACHER

Kreacher and his ancestors have been loyal house elves to the noble family of Black for hundreds of years.  He and Sirius do not like each other, yet while Sirius is alive the Gollum-like house elf must do his master’s bidding.  However, with Sirius gone at the end of OotP, Kreacher will be tempted to make a beeline right back to Narcissa Malfoy whom he still considers his mistress since she is a member of the Black family?  Oh my, this could be news for the Order of the Phoenix because Kreacher has a nasty habit of talking to himself out loud and he knows all about the Order’s precious plans and won’t mind letting top secret tidbits out of the bag now that he doesn't have to mind Sirius.  Kreacher knows a lot about the Order of the Phoenix and each of the people who were at 12 Grimmauld Place, including Hermione's weakness for her cause.  Traps are being set, I'm sure, and Hermione is not only being baited but is the bait as well.  But Sirius was one step ahead of Kreacher and bequeathed him to his godson, Harry, who reluctantly accepted the role as master and heir.  Let’s hope Kreacher really obeys his new master… but if his hands are bandaged then we might wonder who he’s been mumbling too.  Happily, per Dumbledore’s suggestion, he shipped his little sour servant off the Hogwarts’ kitchens where good ol’ Dobby faithfully keeps both eyes on Harry’

By the way, I doubt the Malfoys would be impressed with Kreacher’s house cleaning abilities, anyway.

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Listening in on Kreacher's one-sided conversation.