Almost always seen in trademark lab coat and necktie, black shoes and pants. Switches to grey overcoat and grey fedora for formal events or anything else that takes him out of the laboratory, which isn't often. Sometimes bears satchel with laptop, journal, camera, and the latest in VR technology, usually intended for agressive usage against plush purple dinosaurs.
When at home or in interstellar travel, can be seen with two stocky tabby cats, Ernie and Cecil. Both can communicate in common English, and are imbued with minor psychic abilities.
Necktie Junction has surveyed the progress of Barney the Dinosaur for several centuries, and has only recently touched down in Earth and its respective solar system. Much of his past remains unknown, but early on his home world was conquered, enslaved, and then destroyed by the Hellwyrm and his minions. He has unerringly dogged the machinations of Barney and his Loved Ones, most notably the mass sabotage committed on Aldus IV, with the help of Aldussian rebels. While able to hold his own in physical and mechanical combat, Necktie prefers to save fighting as a last resort and instead dedicates his energy towards inventing and refining Anti-Barneyian weaponry. If not in the lab or in his secluded house in the Minnesotan wilderness, he can often be found scouting the fringes of the galaxy in his ship, "The Magus", with his two feline companions. Friendly and devious, he is also given to isolated moods and may disappear for days, weeks, or even months at a time. His smiling face and firm handshake conceal a man consumed by a desire for vengeance and justice upon the Purple Demon, and while he hosts a fair variety of acquaintances, only a handful he considers trustworthy enough to deem friends. To his knowledge, he is the only surviving member of his home world and is occasionally consumed by intense loneliness. When called upon for action, however, he always manages to let go of these feelings and commit himself to eradicating the universe of Barney and his minions.
Necktie Junction is also regarded as a sage among many in the Jihad, recounting such tales as "The Day of the Barney" trilogy and "Death-Zone Purple," to name a few. He prizes intellect over might and creativity over repetition. If pressed to fight, he will often utilize one of his many devices, typically the Cerebral Cleanser, which can cause immediate disorientation and amnesia for a random period of time.