Hermione has an "audio diary" -it's a tape recorder she speaks into. A dangerous form of diary, that…easily eavesdropped on…The tape in her recorder carries a special charm-it never runs out of tape, no matter how many entries she puts on it.
Ron has a small, leather-bound book, similar to Tom Riddle's diary, except this one is brown, and does NOT have Ron's sixteen-year-old memory preserved in it. ;) It was a birthday present from Hermione in their fourth year, and he's been writing in it ever since. Hermione cast three charms on it before she gave it to him-a Blanking Charm, which blanks it when someone tries to read it without Ron's permission, and two spells on the first two pages of the journal. On the first page, Ron can talk to Hermione and receive an answer-all without Hermione's knowledge. The journal can give an answer based on a self-updating "magical database" of Hermione. The other page is for Harry. This way, Ron can see what his friends might say about a topic without actually talking to them if he needed to.
Harry carries a black, also leather-bound book. It has the Gryffindor crest on the front and back. The first page reads:
The journal of James Potter: Written (and Sometimes Illustrated by Him)And his son, Harry
It is half-filled with James' writing, and Harry's afterward. When Professor Dumbledore gave it to him, he said, "This journal was used by your father, starting in his second year. It was, I believe, a birthday present from Sirius. It came into my possession after he had left school, just after his marriage to your mother, Lily. They were both in the Order then, and he told me that if anything was to happen to him, that I should give it to your mother. I guessed that you could make better use of it."
The charm cast on Harry's journal is a Blanking Charm. The quill shrinks to 1/10 of its full size when slipped into a little storage slot inside the front cover. When it is in use, it is almost identical to Rita Skeeter's Quick Quotes Quill, although it doesn't skew the words being said. Harry doesn't have to speak, however. The quill is quite content to be written with if the need arises.
if anybody has any ideas for a more descriptive version of hermione's diary, please feel free to share them. HaylieJack