If you are having any trouble finding the locations of these character tokens, you can use a map of the HUB, found here.

Slytherin Twin #2
Location:
Knockturn Alley
Cost:
20,000
Abilities:
None
How to get:
Halfway down the alley, there is a cage on the left with spiders inside. Break the cage open to get the token.Halfway down the alley, there is a cage on the left with spiders inside. Break the cage open to get the token.

Luna Lovegood
Location:
School Path
Cost:
50,000
Abilities:
None
How to get:
Use a digging character, or a pet, to dig at the dig spot halfway down the path. This will dig up some large Lego bricks which you can build into stairs on the large purple Lego pad behind them. Use these stairs to reach the token up above them and to the left.

Luna (Blue Jumper)
Location:
Thestral Enclosure
Cost:
50,000
Abilities:
None
How to get:
On the far right of this area, as far right as you can go, there is a tree with two branches wrapped around it. Use magic to pull them back and you will reveal a hollow in the tree, with the token inside.

Luna (Overalls)
Location:
Hogsmeade Station
Cost:
50,000
Abilities:
None
How to get:
When you have unlocked the Reducto spell, use it on the silver box behind the animal run. This will give you the missing piece to put in place on the animal run, so you can send your pet up it and knock down the broom. Hop on the broom when you have it, and fly up onto the stations roof to collect the token.

Luna (Pink Dress)
Location:
Ravenclaw Corridor
Cost:
150,000
Abilities:
None
How to get:
Put on the Spectrespecs that are at the top of the stairs. With those on, head up to the door that would lead to thier common room, and you will see some spectre bricks. Build those and they will create a knocker for the door. The knocker will do it’s job and you will get the token.

Luna (Purple Coat)
Location:
Lovegood’s Lunacy (Level)
Cost:
50,000
Abilities:
None
How to get:
On the ground floor of the house, you will see a fair amount of clutter around the room. To the right of the fireplace is a large pile of clutter. Hit this with a couple of spells until it moves itself around and forms a drumkit. Smash the drumkit with a few well aimed spells, to reveal the token.

Luna (Yellow Dress)
Location:
7th Floor Corridor
Cost:
150,000
Abilities:
None
How to get:
As you enter the corridor from the Great Hall area, there is a suit of armour on the left. Break this open to get the token.

Luna (Lion Head)
Location:
None
Cost:
None
Abilities:
None
How to get:
This character is only available as part of the Character Pack DLC.

Anthony Goldstein
Location:
Library
Cost:
20,000
Abilities:
None
How to get:
Have a Ravenclaw student stand in front of the large portrait and interact with it. This will reveal a red wall which you need to use Diffindo on, to cut a large key out of. Build the bricks into the key and use it on the door beside the portrait. The token is behind the door.

Padma Patil
Location:
Thestral Enclosure
Cost:
10,000
Abilities:
None
How to get:
Walk to the left until you come to the fallen tree trunk that you can walk through. Before going through, walk towards the screen and drop down off the ledge to an area below. Use a pet, or a dig character, on the dig spot and you will uncover a small chest. Hit it with a spell to open it and you will find the token.

Cho Chang
Location:
Aguamenti Classroom
Cost:
75,000
Abilities:
None
How to get:
On the upper level there is a portrait with a lit lamp above it. Use the deluminator to take the light, then walk to the other end of the platform. Here you will see some vines on the wall above you. Use the deluminator on the lamp here, to remove the vines. The vines will drop the head to the statue in front of you. Put it back on the statue and you will get the token.

Cho (Winter)
Location:
Dumbledore’s Army (Level)
Cost:
75,000
Abilities:
None
How to get:
When you get inside the Hog’s Head pub, use Reducto on the padlock that is on the door to the left of the bar. This will lead you down into the basement of the pub. In the left hand corner of the room, there is a wheelchair, which you can jump into. When you jump in the chair, a trail of studs will appear. Collect all the studs and the token will appear.

Penelope Clearwater
Location:
Great Hall
Cost:
60,000
Abilities:
None
How to get:
Open the rune cabinet that is next to the entrance and three candles will float out. Target and hit all three candles to get the token.

Marcus Belby
Location:
Ravenclaw Corridor
Cost:
90,000
Abilities:
None
How to get:
As soon as you enter this area, you will see a black barrier on the left. Use dark magic to break this open and walk into the space behind it, to find the token.

Marietta Edgecombe
Location:
Hogsmeade Village
Cost:
10,000
Abilities:
None
How to get:
Jump onto the vault on the right side of this area. You can then jump up to collect the token that is hovering above the vault.

Marietta Edgecombe
Location:
Hogsmeade Village
Cost:
10,000
Abilities:
None
How to get:
Jump onto the vault on the right side of this area. You can then jump up to collect the token that is hovering above the vault.

Michael Corner
Location:
Hogsmeade Path (Winter)
Cost:
50,000
Abilities:
None
How to get:
As you enter this area, you will see a barrel with a silver padlock on it. Use Reducto to break the padlock, then hit it with a spell and a student in peril will pop out. Hit the barrel again and you will get the token.

Justin Finch-Fletchley
Location:
Diffindo Classroom
Cost:
20,000
Abilities:
None
How to get:
During the Diffindo lesson, you build a red vacuum cleaner to remove a barrier. Keep casting spells at the cleaner until you break it open and get the token.

Susan Bones
Location:
Entrance Hall
Cost:
50,000
Abilities:
None
How to get:
On the left, there is a suit of armour holding a small dagger. Beside it on the wall, there is a sword. Give the sword to the suit of armour and he will throw it around for a bit, then produce the token.

Hannah Abbott
Location:
Diffindo Classroom
Cost:
10,000
Abilities:
None
How to get:
Halfway down the benches on the right side of the room, there is a gap where you can get some Spectrespecs from. Put them on and build the Spectre bricks around Flitwick’s feet. Some students will do a little song and dance and you will find the token.

Zacharias Smith
Location:
Grand Staircase
Cost:
20,000
Abilities:
None
How to get:
Use Diffindo on the red wall that is on the landing above the exit to the common room. The token is tucked behind it.

Fang
Location:
Felix Felicis (Level)
Cost:
10,000
Abilities:
Very Strong, Can Dig
How to get:
When you are in the grounds, you will have to make a potion, but the cauldron is upside down. To get the cauldron to turn over the right way, you need to keep hitting a mole until he comes out through the right hole. When you have done this and the cauldron is up the right way, hit the mole once more to get it to go back into the ground and he will leave behind the token.

Dobby
Location:
DOBBY! (Level)
Cost:
750,000
Abilities:
None
How to get:
When you are fighting the Malfoys and Bellatrix, you will be very restricted as to how far up the room you can travel. Keep fighting until the line across the room that you cannot cross, disappears. When it has, use magic on the fireplace on the left, to get the token.

Kreacher
Location:
Kreacher Discomforts
Cost:
100,000
Abilities:
None
How to get:
To the right of the large portrait of Mrs Black, there is a black cabinet. Use dark magic on it twice, to release the token.

Bogrod
Location:
The Thief’s Downfall (Level)
Cost:
100,000
Abilities:
Safe Key
How to get:
When you reach the vault, there is a red and black chest on the right side. Use dark magic to open the chest and you will see a scroll. Hang the scroll to get the token.

Griphook
Location:
The Thief’s Downfall (Level)
Cost:
150,000
Abilities:
Safe Key
How to get:
When you are near the dragon for the first time, there is a rail switch on the right side of this area. Use dark magic to flip the switch and a rail cart will appear. On the cart you will find a banner and a Weasley box. Unfold the banner and it will become a wall for you to walk up and collect the token. Use the Weasley box to get the sticky trainers so you can do just that.

Ron Weasley (Ghoul)
Location:
None
Cost:
None
Abilities:
None
How to get:
This character is only available as part of the Character Pack DLC.

Lord Voldemort
Location:
The Flaw In The Plan (Level)
Cost:
25,000,000
Abilities:
Dark Magic, Parseltongue
How to get:
Right near the end of the level, where Harry and Voldermort are fighting, there is a covered walkway along the back of this area. If you walk under this and to the right a little, you will find the token hidden behind a pillar.

Tom Riddle
Location:
Fiendfyre Frenzy (Level)
Cost:
2,000,000
Abilities:
Dark Magic, Parseltongue
How to get:
When you are in the final stage of this level, with the brooksticks, jump onto one and fly to the left hand side, towards the screen. You will be able to jump off the broom, onto a ledge with a chest on it. Use magic to empty the chest out and build its contents into a small bed. Jump on the bed to reach the token above it.

Tom Riddle (Orphanage)
Location:
The Horcrux And The Hand (Level)
Cost:
2,000,000
Abilities:
Parseltongue
How to get:
When you reach the large rock, where you deal with the Inferi, there are three black rocks to be found and destroyed, using dark magic. The first one is at the top of the hill, against the back wall, in the middle. The other two can be found behind each of the rock walls that you lower.

Bellatrix Lestrange
Location:
The Flaw In The Plan (Level)
Cost:
3,750,000
Abilities:
Dark Magic
How to get:
During this level, you will need to duel with Bellatrix. To defeat her, you will have to duel with her three times, but when you defeat her for the third time, you will unlock her token.

Bellatrix (Azkaban)
Location:
The Grounds
Cost:
3,750,000
Abilities:
Dark Magic
How to get:
There is a pad in Hagrid’s garden, where you can use Hermione’s bag. She will pull out a flying pumpkin and a line of studs will appear in the air, leading to a token. Jump onto the pumpkin and fly along the row of studs and collect the token at the end.

Lucius Malfoy
Location:
Campsite (Gate)
Cost:
250,000
Abilities:
Dark Magic, Peacock (Pet)
How to get:
To the left of the gate, there is a plant that you can use dark magic on, to reveal the token.

Lucius (Death Eater)
Location:
A Veiled Threat (Level)
Cost:
250,000
Abilities:
Dark Magic, Peacock (Pet)
How to get:
When you are running from the falling shelves, you will come to a point where you are safe before you need to run some more. On the left of this area, there is a purple Lego pad on a table, and two pieces of Lego on the floor. Use magic to put the two pieces onto the pad, and build a dark propheciy. Use dark magic to break this open and collect the token.