is for Albus Dumbledore

Albus Dumbledore is the Headmaster of Hogwarts for Harry's time there, till his 6th year. House-Gryffindor

is for Bill Weasley

Bill Weasley is the eldest Weasley kid. He is Ron's eldest brother, and interests in adventure.
House-Gryffindor

is for Crookshanks

Crookshanks is Hermione's cat. He appears in Harry Potter 3 to 5

is for Draco Malfoy

Draco Malfoy was Harry's arch enemy during his school years. His parents, Lucius and Narcissa Malfoy are both death eaters.House-Slytherin

is for Errol

Errol is the Weasley's family owl. Ron's parents would use him to communicate with their children at Hogwarts. Errol is famous for his clumsiness.

is for Fred Weasley

Fred Weasley is the twin of George. He and his twin brother are known to be mischievious and for pranks. He died in the Battle of Hogwarts.
House-Gryffindor

is for George Weasley

George Weasley is the twin of Fred. He and his twin brother are known to be mischievious and for pranks. He was deeply injured while his ear got cut while protecting Harry.
House-Gryffindor

is for Harry Potter

Harry Potter is the main character on the show. He had tragic childhood. He was raised by his Uncle and Aunt. He is the one to kill Voldemort.
House-Gryffindor

is for Igor Karkaroff

Igor Karkaroff is the headmaster of Drumstrang school of magical educations.

is for James Potter

James Potter is the father of Harry. He fell in love with Lily and married her. He got the nickname "Prongs"
House-Gryffindor

is for Kreacher

Kreacher is the Black Family House Elf

is for Luna Lovegood

Luna Lovegood was a strange girl for everyone, but after she showed how kind she was, and how she really helped Harry, she got a lot of friends.
House-Ravenclaw

is for Minerva McGonagall

Minerva McGonagall was the Head of Gryffindor house and Transfiguration teacher while Harry's time at Hogwarts. She was an animagus.
House-Gryffindor

is for Neville Longbottom.

Neville Longbottom was a boy who was nervous and got easily scared. But he slowly developed and became one of the most courageous people in the series.

is for Oliver Wood

Oliver Wood was the Quidditch team Captain of Gryffindor till Harry's 3rd year.

is for Petunia Dursley

Petunia Dursley was the sister of Lily Evans Potter and Harry's Aunt. She was jealous of her sister because she didn't get magical powers while Lily did.