This character is a boy who looks like, or is usually mistaken, for a girl.
Dressing and acting like a girl is optional.
"Trap" does not imply any specific form of sexual orientation but only the physical appearance.
This trait is to be used for works that explicitly frame a male character as female in order to "trap" the player. For gender ambiguous body types use Androgynous instead. For characters whose self-described gender identity does not match their sex, use Transgender.
Do not apply the trait to transsexual characters, nor to the characters with a Newhalf body type, as these are separate fetishes. A possible exception could be allowed, if the character starts as a Trap and later transitions during the course of the story.