Final Fantasy Wiki
The following article is based on a subject that has not been officially named in any official Square Enix material; the current title is merely a placeholder.

Dragqueen joined as a player's unit.

The Dragqueen is an enemy unit in the PlayStation version of Final Fantasy Tactics who can be encountered randomly in the first level of Midlight's Deep, called the NOGIAS (The Crevasse). The Dragqueen appears as a male Time Mage, but will scream like a female when KO'd. The player can recruit the Dragqueen using Orator's Entice or Invitation. After the Dragqueen has joined the player's party, Dragqueen's sprite will change to a female Time Mage, but retains the male portrait.

This particular character is essentially a female unit, meaning the Dragqueen has access to the female-exclusive equipment and the job class Dancer, rather than the male-exclusive job class Bard. If the job is changed to Dancer, the Dragqueen's sprite and portrait will use the Bard's set with the job command Dance.

It is unknown whether the presence of the Dragqueen is a bug or an Easter Egg, but its correction for the The War of the Lions version suggests it was a bug. Either way, this phenomenon does not seem to be hazardous.