In romance, a lovely version of disguise based on assumptions is when assumptions are set aside and the couple make a connection. Darcy and Elizabeth, of course, are a classic example. Elizabeth especially--since so much of the novel is told from her perspective--sets aside her assumptions about Darcy (based on her own ideas and Wickham's insidious suggestions) to figure out the guy as he is, from his housekeeper, no less!
In yaoi/MM romance, Winterbourne and Wataya are two great examples. In Joanna Chambers' Introducing Winterbourne, the secondary hero, Adam, realizes that his host for the day, Lysander Winterbourne, is not like his father. His blond good looks and careful tact are not the looks and actions of a self-entitled brainless profligate yuppie (the 19th century equivalent) but those of an insightful and kindly man who would rather be looking after an estate than meeting people in parlors.
In
Cherry Magic, Tsuge originally sees Wataya as a "punk." His magic allows him to see that Wataya is actually a pretty responsible and straightforward guy--who likes cats!
The "reveal"--the disguise tossed off--happens mentally. It is just as satisfying as a cloak being removed.
