Disclaimer: I am not George Lucas or J.K. Rowling.
Here are the characters in this story:
Harry Potter - Luke Skywalker (age 12), second year
Ron Weasley - Han Solo (age 12), second year
Hermione Granger - Leia Organa (age 13), second year
Ginny Weasley - Mara (Jade) Solo (age 11), first year
Fred Weasley - (Ton) Phanan Solo (age 14), fourth year
George Weasley - Face (Loran) Solo (age 14), fourth year
Percy Weasley - Jacen Solo (age 16), sixth year
Molly Prewett Weasley - Jaina Solo (age 46), mother to Han Solo
Arthur Weasley - Jonash Solo (age 45), Head of the Misuse of Mundane Artifacts Office
Dobby - I-5YQ "I-Five" (age 27), protocol droid
Errol - Fiver (age 80), astromech droid
Perkins - Peckhum (age 70), employee of the Misuse of Mundane Artifacts Office (mention only)
Draco Malfoy - Galen Marek (age 12), second year
Lucius Malfoy - Dooku Marek (age 39), member of the Jedi Council
Borgin - Seb Arkos (age 45), black market dealer
Vincent Crabbe - Cornelius Evazan (age 12), second year
Gregory Goyle - Ponda Baba (age 12), second year
Albus Dumbledore - Yoda (age 111), Grand Master
Minerva McGonagall - Mon Mothma (age 71), Master of Metamorphosis
Filius Flitwick - Sio Bibble (age 71), Master of the Force
Mr. Granger - Bail Organa (age 54), father of Leia Organa
Mrs. Granger - Breha Organa (age 54), mother of Leia Organa
Severus Snape - Darth Vader (age 32), Master of Potions
Gilderoy Lockhart - Valenthyne Farfalla (age 38), Master of Defense Against the Dark Side of the Force
Lord Voldemort / Tom Riddle - Lord Sidious / Cosinga Palpatine (age 66), Dark Lord of the Sith
Rubeus Hagrid - Chewbacca (age 63), gamekeeper
Argus Filch - Jurokk (age 56), caretaker
Colin Creevey - Dak Ralter (age 11), first year
Hedwig - Artoo Detoo (age 12), astromech owl
Fawkes - Vergere (immortal), Fosh
Oliver Wood - Tycho Celchu (age 16), sixth year
Angelina Johnson - Dia Passik (age 14), fourth year
Alicia Spinnet - Shalla Nelprin (age 14), fourth year
Katie Bell - Tahiri Veila (age 13), third year
Rolanda Hooch - Garven Dreis (age 58), coach
Vernon Dursley - Owen Lars (age 43), uncle to Luke Skywalker
Petunia Dursley - Beru Lars (age 43), aunt to Luke Skywalker
Dudley Dursley - Laze Loneozner Lars (age 12), cousin to Luke Skywalker
Marcus Flint - Moradmin Bast (age 17), seventh year
Penelope Clearwater - Tenel Ka Djo (age 16), sixth year
Lee Jordan - Wes Janson (age 14), fourth year
Pansy Parkinson - Vestara Khai (age 12), second year
Millicent Bulstrode - Gethzerion (age 12), second year
Neville Longbottom - Wedge Antilles (age 12), second year
Seamus Finnagan - Nien Nunb (age 12), second year
Dean Thomas - Lando Calrissian (age 12), second year
Poppy Pomfrey - Vokara Che (age 46), nurse
Parvati Patil - Winter Retrac (age 12), second year
Godric Gryffindor - Darth Revan (deceased), founder
Salazar Slytherin - Exar Kun (deceased), founder
Rowena Ravenclaw - Bastila Shan (deceased), founder
Helga Hufflepuff - Meetra Surik (deceased), founder
Cuthbert Binns - Vodo Siosk-Baas (deceased), Master of Galactic History
Nicholas de Mimsy Porpington - Canderous Ordo (deceased), spirit of House Revan
Patrick Delaney-Podmore - Zac'ryah Vos (deceased), spirit of the Kiffar Army
Bloody Baron - Jace Malcom (deceased), spirit of House Kun
Fat Friar - Mission Vao (deceased), spirit of House Surik
Helena Ravenclaw - Satele Shan (deceased), spirit of House Shan
Myrtle Warren - Lorana Jinzler (deceased), spirit of the first floor girls' refresher
Peeves - Bogan (amortal), holodroid
Fang - Drang (age unknown), vornskr
Giant Squid - Colo Claw Fish
Basilisk - Dragonsnake (centuries old), monster
Cornelius Fudge - Cal Omas (age 46), Chief of State
Scabbers (Peter Pettigrew) - Nute Gunray (age 33), Sith disguised as womp rat (Viceroy)
Hermes - SD-XX (age 16), astromech droid
Irma Pince - Jocasta Nu (age 81), archivist
Aurora Sinistra - Tionne Solusar (age 42), Master of Astronomy
Mafalda Hopkirk - Viqi Shesh (age 38), Republic bureaucrat
Lavender Brown - Bria Tharen (age 12), second year
Aragog - Gorog (age 52), Killik leader
Ernie McMillan - Corran Horn (age 12), second year
Hannah Abbot - Iella Wessiri (age 12), second year
Justin Finch-Fletchley - Ooryl Qrygg (age 12), second year
Susan Bones - Mirax Terrik (age 12), second year
Pomona Sprout - Yaddle (age 69), Master of the Living Force
Mafalda Goshawk - Mander Zuma (age 50), author (mention only)
Armando Dippet - Fae Coven (deceased), former Grand Master
Mr. Mason - Mr. Whitsun (age 50), businessman
Mrs. Mason - Mrs. Whitsun (age 50), businesswoman
Mundungus Fletcher - Niles Ferrier (age 50), smuggler (mention only)
Olive Hornby - Jenna Zan Arbor (deceased), Jedi student
Locations:
Hogwarts School - Jedi Temple (Chamber of Secrets - Dark Temple)
The Burrow - The Trader's Luck
Ottery St. Catchpole - Coronet, Corellia
Gringotts Bank - Muunilinst
Leaky Cauldron - Chalmun's Cantina
Diagon Alley - Mos Eisley
Flourish and Blotts - Obroa-skai
Forbidden Forest - Unknown Regions
Surrey - Tatooine
Number 4, Privet Drive - Lars Homestead
Platform 9 3/4 - Docking Bay 94
King's Cross Station - Mos Eisley Spaceport
Quidditch Pitch - Smashball Field
Madam Malkin's - Shmi Skywalker's
London - Coruscant
Hogsmeade Station - Docking Bay 327
Hogwarts Express - Jedi Cruiser
Knockturn Alley - Nar Shaddaa (Borgin and Burkes - Arkos and Thynes)
Species:
Human - Human
Goblin - Muun
Dwarves - Melodies
Half-Giant - Wookiee
Muggle - Mundane
Wizard - Force wielder
Acromantula - Killik
Boarhound - Vornskr
House-elf - Protocol droid
Owl - Astromech droid
Pixie - Vagaari
Phoenix - Fosh
Ghost - Force spirit
Poltergeist - Force entity
Squib - Void in the Force
Organization
Gryffindor - Revan
Slytherin - Kun
Ravenclaw - Shan
Hufflepuff - Surik
Death Eater - Sith Order
Order of the Phoenix - Jedi Order
Ministry of Magic - Galactic Republic
Other:
Wizard's Chess - Dejarik
Quidditch - Smashball
Bludgers - Dovin basals
Quaffle - Grav-ball
Golden Snitch - Golden Globe
Apparition - Force Travel
Disarming Charm - Force Disarm
Polyjuice Potion - Ooglith masquer