Professor Colan is a minor character from Transformers: Revenge of the Fallen, serving as an astronomy professor at Princeton University during the early college segment of the story. His professional background is that of an established academic in his field, teaching astronomy to undergraduates at a respected university. The character was inspired by a real professor the director knew from his own university days, which shaped the portrayal of a distinctive and theatrical lecturer.

In terms of personality, Colan is charismatic, flamboyant, and highly conscious of his own image. His classes are popular, particularly among female students, and he appears to thrive on being the center of attention. He delivers his lectures with dramatic flair, mixing enthusiasm for his subject with playful commentary about his audience, and he seems to take great pride in his ability to command a room. He is also vain about his authority and reputation, reacting sharply when anyone challenges his position. He has a sarcastic streak that he employs both when disciplining students and when making amends, and he regards his classroom as his personal domain.

His motivations center on maintaining control over that domain and preserving his standing in front of colleagues and superiors. On the first day of the semester, Colan is in the middle of a carefully staged presentation while one of the university's deans is present. When Sam Witwicky, whose mind is being overwhelmed by alien symbols, interrupts the lecture, rushes the podium, and commandeers the chalkboard, Colan interprets the disruption not as a genuine emergency but as a humiliating practical joke staged in front of the dean. His priority in that moment is to reassert his authority, and he declares the classroom to be his universe before ordering Sam out and banning him from the class.

The main relationship in his part of the story is with Sam Witwicky. At first, Colan sees Sam only as a rude and disruptive student who embarrassed him in front of a superior, and he responds with indignation and expulsion. Their dynamic changes slightly several days later, after a global crisis in which the sun is nearly destroyed by the Decepticons. When Sam returns to the class, Colan allows him back, but he does so with pointed sarcasm, mockingly addressing him as Professor Einstein. This exchange suggests that Colan is willing to move past the earlier incident, though his tolerance is guarded and expressed through humor rather than genuine warmth.

Within the larger story, Colan fills a small but memorable role. His expulsion of Sam provides a moment of conflict rooted in ordinary academic life, contrasting with the extraordinary events unfolding around the main character and emphasizing how far outside normal experience Sam has been pulled. His later reappearance adds a touch of comic closure, signaling that everyday routines have resumed after the chaos of the preceding days. The character does not undergo meaningful development, but he does shift from outright hostility to a sarcastic form of grudging acceptance.

His notable abilities are academic rather than physical. He is a knowledgeable astronomer capable of delivering engaging and theatrical presentations, and he possesses a sharp wit that he uses to maintain control of his lectures and to put students in their place. Above all, his defining strength is the authority he holds over his classroom, which he wields decisively whenever he feels his position is being challenged.