Stricklander, more commonly known as Walter Strickler, is a major antagonist-turned-protagonist in Trollhunters (the first installment of the Tales of Arcadia trilogy), being the central antagonist in Part 1 and a supporting protagonist in Part 2 and Part 3. He is a changeling troll who swapped places with a human named Waltolemew Strickler to disguise himself as a human and fit in to our society.
He is voiced by Jonathan Hyde, who also played Van Pelt in Jumanji.
Stricklander was very scheming, manipulative, and power-hungry. As Jim's history teacher, he was able to keep him from knowing he was not a human at all, but a changeling troll. He also conspired with Bular to capture Jim so he can use his amulet to free the made-of-evil troll named Gunmar. However, after Bular's death, he conspired again with Angor Rot so he can rule the world with the other changelings. It is unknown why he wanted hegemony.
However, Stricklander eventually found his redemption after Jim and Blinky defended him from the mob of trolls in Trollmarket, and gave Jim Gunmar's Eye (the last Triumbric Stone) so the latter can defeat Gunmar himself. However, he is not immediately redeemed, but this eventually happened as the show progressed.
Powers and Abilities
Shapeshifting: Stricklander is able to disguise himself as a human since he swapped places with a baby named Waltolomew Strickler, who is currently in the Darklands.
Flight: Stricklander has the ability to fly, which is shown in Part 3.
Knife-wielding: Stricklander is perfectly able to wield and throw knives.
Although his real name is "Stricklander", the main characters call him "Strickler" because it is more easy to pronounce.