Disguised is a keyword found on characters.
At any time you could play a character from your hand during the conflict phase, choose any non-unique character that matches the restrictions listed on the disguised character. Put the disguised character into play, unbowed, in the same location that the chosen character is, reducing the cost to play the disguised character from your province or your hand by the printed cost of the chosen character. The disguised character can't have additional fate put on them when they're played in this way. Move all attachments and tokens (including fate tokens and status tokens) from the chosen character to the disguised character. Discard the chosen character from play.