Kludd

He is skeptical, impatient, and envious, but he is also intelligent and ambitious, seeking power and recognition, according to the Guardians of Ga'Hoole Wiki.
Main Features:
Skepticism and Impatience:
Kludd doesn't believe in the legends of Ga'Hoole and is annoyed with his siblings and parents, especially with the attention they give to Soren.
Envy and Jealousy:
He is jealous of Soren and the attention his parents give him, which turns into hatred and a desire to hurt him.
Ambition and the Pursuit of Power:
Kludd seeks to be appreciated and respected, finding this in the Pure Ones and the power they offer.
Intelligence and Cunning:
He is intelligent and plans his moves, such as deceiving Soren and manipulating Eglantine.
Lack of Love and Affection:
Kludd loses affection for his family, including Eglantine, whom he tries to recruit into the Pure Ones.
Relationship with Nyra:
Kludd has a complex relationship with Nyra, which can be seen as either love or attachment.
In short, Kludd is an ambitious and cynical character, driven by envy and the pursuit of power. His complex personality makes him an effective antagonist, who stands out for his ability to manipulate and deceive others.