Step One: Assign your student’s ability scores.

In the Hogwarts RPG(as most other RPG’s), characters have two sets of stats that determine how well they perform at a given task. We use 4 stats: Physical, Intellect, Will, and Social that range from 1 to 9. You decide how to rank these scores by rolling 4 six sided die, adding the result of each roll, and assigning points to each stat until you reach zero. A normal human average is considered a 3 in each stat, with anything six or above seeming bizarrely high to others(Such as Hermione’s intellect, which is a 6 in game terms). Be careful in how you assign these scores, because they are very difficult to change for the better, and can oftentimes be changed for the worse. Such is the danger of High School.

Physical: A student’s physical stat determines the students physical ability to perform tasks without any kind of magical assistance. Cleaning house without magic, swimming in the lake, shoving a wand up a troll’s nose, whatever, this stat handles physical strength, stamina, and speed. Characters with high physical stats include Oliver Wood, Crabbe and Goyle, and of course, Hagrid.

Intellect: The student’s intellect reflects his ability to learn and reason, including the ability to learn spells. Solving the potions riddle guarding the mirror of Erised was a feat of intellect, as was brewing a Polyjuice Potion. Examples of characters with high intellect scores are Hermione Granger, Luna Lovegood, Lord Voldemort, and Albus Dumbledore.

Will: Will is the measure of a students strength of character, and how difficult it is to make him deviate from that path. Determination would also be a good way to describe this stat. Please take into account that this does not mean that the character’s will will be good, remember Lord Voldemort was willing to cut his soul into pieces in order to become immortal. Characters with high will scores would be personified by Harry Potter and Lord Voldemort.

Social: The students social stat is his innate degree of social standing, based on physical attractiveness, social acceptableness, and known history. Characters from the books with high social stats would be Cho Chang, Cedric Diggory, or Draco Malfoy.

Chapter Two: Characters
Whether we be old and bald
Or young with scabby knees,
Our heads could do with filling
With some interesting stuff,
For now they’re bare and full of air,
Dead flies and bits of fluff,
In the Hogwarts RPG, the most versatile and fun to play characters are students. Almost all the characters you will play will be students and the game is oriented toward playing students. The reason for this is that growing up in a world of such amazing power offers far more choices for good or ill than participating as a professor, or auror, or ministry employee, or Stan Shunpike of the Knight Bus. As students, you are offered several choices and will be affected by several events outside your control(Tradition and the adult world, to name a few) in the creation of your character. Still you have many options to use when creating your character.
Step Zero: Conceptualize.
Each character in the Harry Potter universe has a consistent moral compass, however skewed (Such as the cases of Professor Snape, Draco Malfoy, and Even Lord Voldemort). Each character has fears, desires, anxieties, joys, and even hobbies. Fred and George Weasly valued laughter and family above school and authority, for example, and consistently chose according to this. Remember that you are taking on an important role at Hogwarts. The most important role, as a matter of fact, for if there were no students, the teachers would be elsewhere, finding other kinds of jobs or guiding other students at other schools. It is therefore important that you know your character has his own thoughts and feelings.
Some suggestions I might make to get you started are: Is your character Muggle Born or Wizard Born? Which house did his or her parents belong to? Did he or she agree with his or her parents choices? Does he or she have any favorite pastimes or hobbies? Does he or she have any relatively unusual talents? Who are his or her friends? What is his or her physical appearance like? Does he or she like animals, or have any pets? What are his or her aspirations or goals?
Be careful how you create your character’s personality, as well. It will affect what opportunities are available to him or her, what house he or she belongs to, et cetera. This is a very important step, don’t skip it!