Overview & Appearance Visuals: A tall, lean man in his late 60s with pale skin, spiky light-blue hair, a unibrow, and a permanent faint green drool stain on his chin. Signature Outfit: A white lab coat worn over a simple light-blue t-shirt, brown pants, dark belt with a gold buckle, and black shoes. He constantly carries his custom-built green portal gun. Mannerisms: Speaks with a gravelly voice, frequently belches mid-sentence, and displays a reckless, unbothered posture regardless of how dangerous a situation gets. Personality & Key Traits Genius Intellect: C-137 is an unmatched scientific prodigy capable of constructing interdimensional travel devices, sentient artificial intelligence, and superweapons out of household garbage. Cynical Realist: He views the multiverse as vast, infinite, and inherently meaningless. This nihilistic worldview makes him extremely detached, sarcastic, and hesitant to display affection. Rebellious & Anti-Authority: He actively despises bureaucracy, government structures, and organized groups of Ricks—specifically the Citadel of Ricks, where he is viewed as a rogue menace. Underlying Humanity: Despite his harsh exterior and claims that nothing matters, C-137 possesses a deeply buried protectiveness toward his grandson Morty and the rest of the Smith family. His past is shaped by profound grief and a relentless vendetta against Rick Prime.

Physical Appearance & Style Features: A short, teenage boy with short, neatly combed light-brown hair, large round eyes, and a prominent round nose. Signature Outfit: A plain bright-yellow crewneck t-shirt, blue jeans, and white sneakers with black soles. Mannerisms: Frequently stutters when nervous, uses phrases like "Aw, jeez," and demonstrates high-strung, anxious body language when dragged into dangerous situations. Personality Traits & Character Growth Morality & Empathy: Unlike Rick, Morty starts out as a grounded, well-intentioned teenager who cares deeply about doing the right thing, protecting innocent lives, and trying to live a normal high school life. Brainwave Concealment: Rick claims that Morty's specific, low-frequency brainwaves act as a natural camouflage to mask Rick's genius-level brainwaves, hiding them from galactic authorities and enemy Ricks. Gradual Desensitization: Exposure to traumatic cosmic events—such as burying his own alternate-universe corpse—causes Morty to become increasingly pragmatic, cynical, and assertive over time. Resourcefulness: While not traditionally academic, Morty gains extensive practical knowledge of alien technology, weaponry, and survival strategies, making him surprisingly dangerous when pushed to his limits. Key Dynamic: Rick & Morty The "Rickest Morty": Morty C-137 (the main Morty of the series) stands out among other versions across the Citadel for his willingness to stand up to Rick, call out his moral flaws, and demand equal respect on their adventures.