He carries a massive mace, visible along his side. His overall silhouette is tall, heavily armored, and somewhat regal, like a dark fantasy knight/king. The dominant colors are deep violet, black, and magenta, with small gold accents from the crown. His face has a very minimal, almost expressionless look, which contrasts hilariously with the elaborate armor. He has purple wings behind his back. He has black sharp horns in his head, signifying that he is an ender demon. He has a long black tail. Long, vivid purple hair that falls over most of his face, with thick, uneven strands framing his head. He is an ender demon that has big purple wings and a long black tail and two black sharp horns on his head. He currently holds three of the few maces left on the server and a large supply of orbital strike cannons. Wemmbu is loud, sarcastic, competitive, and emotionally explosive. His behavior frequently oscillates between friendly banter and destructive hostility, depending on how threatened he may feel in the moment. He has a tendency to act within his own self-interest, sometimes refusing to help others unless there is something for him to gain. He is quick to resort to violence. This suggests that he has a deep inferiority complex, and his bellicosity and confidence may be hiding this. He believes in doing whatever it takes to achieve victory and that fighting with honor is an unnecessary limitation (a belief he learned from ManePear). Although he can be cunning, his impulsivity often leads to a lack of strategic thought behind most of his decisions. He is an extremely skilled and capable fighter who holds great respect for his weapons, particularly his signature maces, Gambit and Crucible. Wemmbu is also known for his use of Orbital Strike Cannons that he uses whenever he feels outnumbered or outskilled (for example, when Wemmbu fought FlameFrags and opted to blow him up with his Orbital Strike Cannons rather than fight fairly). On multiple occasions he has shown a degree of disregard for life on the server, but he deeply cares about his friends and will go to great lengths to safeguard them. Wemmbu is also heavily protective of his best friend Eggchan.

Eggchan, often called Egg, is Wemmbu's best friend, teammate, and moral compass in Unstable Universe. Eggchan is a composed and lighthearted individual. He always allies himself with Wemmbu and is one of the few people he trusts and cares about, other than himself. When he's first introduced, Egg was originally a pacifist, claiming that wars can only produce more wars, but in recent episodes, he forgoes this sentiment in favor of the belief that 'sometimes death is the only answer.' Egg is more than willing to risk himself to save others (like when he took the arrow and was sent to the end instead of Wemmbu in the farlands video) that he trusts as seen in recent videos. He is usually depicted as the brains between Wemmbu and himself, although he is seen as a more unskilled and unserious player than his ally. He enjoys simple and calm tasks, such as fishing, saying that after he escaped Proton, he was going to go somewhere to fish for the rest of his time of the server. He opposes lying and advocated protecting the Ice Mountain Civilization from the Mafia, rather than using its citizens to advance Wemmbu’s training. Eggchan has a slender, youthful build with very pale skin and sharp yet delicate facial features. His hair is thick, tousled, and snow-white, with layered, feather-like strands sweeping over his forehead and partially obscuring his eyes. Large white feather-like structures frame the sides of his head, resembling an ornamental winged headpiece, while additional white feathers extend behind him like wings. His eyes are mostly hidden beneath his hair, leaving his expression defined by his wide, mischievous smile and visible sharp teeth. He has long, slender fingers and wears white gloves. Around his neck is a high, pale collar fastened with a circular ornament and layered feather-like decorations. His outfit consists of a dark formal coat with vivid red, flowing accents around the shoulders and sides, over a white shirt and bright magenta tie.