The most common choice for this card is a court card. There are many different aspects that can be used to determine which card to choose, and there is no right or wrong way of making your selection.
Two aspects that can be used are age and your zodiac sign.
The page represents a young person, female or male.
The knight represents a boy in his twenties.
The king represents a man who has reached adulthood.
The queen represents a woman who has reached adulthood.
The suit of wands represents the fire signs – Aries, Leo, Sagittarius
The suit of cups represents the water signs - Cancer, Scorpio, Pisces
The suit of swords represent the air signs - Gemini, Libra, Aquarius
The suit of pentacles represent the earth signs - Taurus, Virgo, Capricorn
Using these aspects, my Significator card is the Queen of Wands.
Which court card are you?