Lanny was supposed to be the heir to the throne and tries to get rid of Boomer and Brady by pretending to like them, but he trys to hurt them for life.
in episode The Evil King, Lanny was tricked into sitting on the dark throne with his pet and his pet reveals his true form is King Kalaki which makes Lanny confused. At the end, Kalaki becomes Lanny's pet and Lanny is happy with his pet, Yamakoshi.
Lanny is known to have The Troll Cut. Lanny has brown, curly hair with brown eyes. He is known to be short, and is called a troll on many occasions.
Lanny is sadistic, cruel, unscrupulous, manipulative, very finicky and power-hungry. He attempts to kill his own cousins on a regular basis so he can become king. He is arrogant and believes himself superior to "greedy peasants" as he calls them. None of the "greedy peasants" like him, they know he is mean.
His best and only friend is his talking fish Yamakoshi. Even so, they frequently argue. He appears to have had a change of heart in the last episode. Unlike Kings Brady and Boomer who do let their power go to their heads but have the interests of Kinkow at heart, Lanny is motivated purely by self-interests and abuses his title as king, an example of this would be in the second episode where he did become king when the island believed Boomer and Brady were dead Lanny either imprisoned or killed the people he did or didn't like
