Professor Flitwick

Professor Flitwick appears in both video games

Background
Filius Flitwick is the Charms teacher at Hogwarts School of Witchcraft and Wizardy. He is the head of Ravenclaw House. Because of his extremely short size, whilst in his classroom he stands on books so he can see over his desk, in order to teach the students.

Spells taught to students in Years 1-4
During their Hogwarts years, students must learn spells. In LEGO Harry Potter: Years 1-4, he is the first teacher required to teach spells. The first lesson he teaches is Wingardium Leviosa, after the first level of the game (The Magic Begins). Then, later in the game, he teaches Lumos. Professor Sprout then teaches Lumos Solem to students. After learning both spells in Flitwick's classrooms, the player is able to go back into the classrooms to unlock more characters.

Spells taught to students in Years 5-7
Once again, Flitwick teaches students spells. The first lesson he teaches is in year 5. This spell is Diffindo, which is the spell required to destroy red walls to make chapes out of LEGO pieces. Then, in Year 6, He teaches students Aguamenti, the water spell. Finally, still in Year 6, the player is taught Reducto, the metal object destroying spell.