There are many, many things that aren't defined in JK Rowling's world that may be necessary to the trivialities of game play; it is up to the mods to provide a skeleton of the 'game canon', but it is also up to the players to define their world and add to the richness of our universe.
The following lists are meant to help players keep continuity in the realm of game canon. Please feel free to comment if you have additions you would like to make!
Cambyses Aether- Well-known author of a (very old) collection of purist essays. Pureblood (name has died out).
Nicholas Farren- Author of a series of literary wizarding adventure novels. Halfblood.
Amora Darnell- Author of many, many cheap and trashy wizarding romance novels. Is actually a wizard named Bob Hedger who is using a female penname to sell books. Halfblood.
Lisha Gizem- Author of a popular mystery series starring clever witches. Fullblood.
Pratima Hopkins- Mystery novelist. Has a tendency to write nearly the same story every single time. Halfblood.
Samuel Hanson- Poet who mostly writes about love, the joy of magic, and new discoveries. Muggleborn.
Marcus Middleton- Essayist for the Muggleborn cause. Attempts to combat Cambyses Aether’s essays. Halfblood.
Matilde Gamp- Author of a series of books on parenting with purist values. Pureblood
Beneath the Water When a young and prominent wizard goes too far in his exploration of the ocean depths, he finds himself kidnapped and caught in the crossfire of a Merpeople war. There are those among them who wish for pleasant relations with the wizards above, and others who fiercely oppose the idea, feeling that only tragedy could come from cooperation with the magical people of the land. The young wizard must learn to adjust to his captive state under water as he devises ways to escape - often aggravating the unfriendly side he was found by - and along the way experiences an adventure like he had never seen before. Action and intrigue colour this novel from beginning to end as worlds collide.
Beyond the Mist
The Farthest Land
Livia Ashworth: German descended author currently living on her own in the English Moors. Fullblood
A Murder Misremembered (debut novel)
A murder stroy about a German witch suffering from insomnia who murders her husband. Ashworth's novel is dark themed and suspenseful, described by Dorcas's book critique friend Fitz as a "gorefest thriller". [ref].
Illuminado Honore - one of the pioneers of studying memories and other aspects of the human subconscious.
The Subconscious Minde: A Study of the Human Braine.
The book has been out of print since the 17th century but three copies survive at Obscurus Books, Diagon Alley.
Francis James Flannery -
one of the 16th century's most celebrated male Seers, specialising in reading tea leaves.
Interpreting the Uninterpreted.
The book has been out of print since the 1812 but there are still at least two copies for sale at Obscurus Books, Diagon Alley.
Horace Voice- Sketchy herbologist who never seems to be able to keep a job very long at one place. Known for stealing magical herbs from his past jobs (any guess why he keeps getting fired?). Muggleborn.
101 Herbs and How to Smoke Them
How to use several magical and muggle herbs for recreational purposes.
T. J. Kelvin - halfblooded writer and illustrator of the wizarding comicbook series Mandrake Man. Mandrake Man was part of a herbological experiment gone terribly wrong. An unidentified potion (Otherwise known as Potion X) got spilled into his pot, and when he was depotted as a sproutling, he never screamed. The Herbologist, Professor Pervonian, thought that this was a sign. As years of working with dangerous plants and potions had left her barren, she raised Mandrake Man as her own son. Suddenly! on Mandrake Man (his real name is Gershwin)'s 17th birthday, his "mother" was kidnapped, taken from him and forced to breed a new line of evil plants by a nameless Supervillain, most often referred to as "Him" or "My Arch Nemesis." Mandrake Man began to train. He has the power of Supersonic Scream, which, while not fatal (unless he wants it to be, which he usually doesn't as he is A Good Guy), renders his enemies helpless -- and sometimes unconscious -- unless, of course, they are wearing earmuffs (his kryptonite -- please excuse the blatantly muggle reference). He also has a healing ability, because that is what mandrakes do, and it has come in handy many-a-time. The series has been on-going since 1947. Mandrake Man has died and been "re-sprouted" three times since the comic began, and in the late 60s he "pollinated" with Fanged Geranium Gal. There was such a fan revolt that both F.G.G. and their sproutling were very quickly killed off by fan favourite villain, Dr. Gillyweed.
Boudicca Radford - a classic female blues/jazz artist, recorded music during the early part of the twentieth century. [ref]
III. Magical Objects;
Portkeys
Fixed portkeys are timeable portkeys that can be used from a fixed point A to a fixed point B (eg Quidditch world cup portkeys).
The portkey is engaged with a portus fixus spell.
Fixed portkeys will travel at a certain time, regardless of whether they are being touched or not.
Portable portkeys move with a person and can be used anywhere to get from an unfixed point A to a fixed point B. (Think Triwizard tournament cup).
The portkey must be engaged with a portus spell.
Portable portkeys are not 'timed' - once portus is cast, it becomes a viable portkey at the next touch.
Quiescent magic detector ("Warden" in common vernacular)
Similar to a sneak-o-scope, but which detects non-activated magical spells. Looking much like a compass, needles on the face point towards such spells, colour-coded for the nature of the spell (wards, concealments, portkeys, other triggers, etc).
Used by the DMLE, especially in searches of premises, Wardens are otherwise illegal. Neither this nor the high cost of acquiring one prevents them from being used by criminals, though the black market version typically can only get through the most primitive of wards.
IV. People;
Minister Trimble has more than one child and a family.
Bertrand Hilyard - expensive and snotty caterer to the rich [ref].
Mr. Otto Strazinski - Owner of Slug and Jiggers Apothecary: The infamous Mr. S. is a cool and accepting guy who wants his employees and customers to like him, but also takes potion-making ingredients very very seriously. As a halfblood with a muggle mother and muggleborn father, a person's bloodline obviously does not factor in to his hiring process.
Becky, Chanticlear, Toby, Alberto - Other Slug and Jiggers employees; Alberto wears glasses, can sleep standing up and with his eyes open, and is rumoured to be a super hero.
Caius Chiaroscuro - owner and shopkeeper of Obscurus Books. Ancient-looking wizard with silver-grey hair cut to the shoulders and a neatly trimmed beard. Mr Chiaroscuro, at first, can seem to be an unapproachable man with no tolerance for nonsense (especially from his employees). He does value hard work and dedication, and he usually grows a little nicer after a couple of months.
Mr. Lachlan Abergavenny - Landlord of Grindylow Gardens. Halfblood. Fat, jovial, middle aged man who is quite kind to his tenants and tries to promote tenant bonding by posting on the billboard who is moving in whenever a new tenant comes in. Widowed with one daughter who is currently studying abroad in France.
Trevor Cooper - Self-proclaimed God of the Archival Rooms in the Department of Mysteries. Extremely anal-retentive about organization -- thus every archive/book/piece of writing in the room is cross referenced fifty thousand times. Will be angry if you mess up his organization. Seems to not mind dust and enjoys keeping the Archival Rooms dimly lit.