Born on June 20th, 2043, Tin-Tin Kyrano is 22 years old. She is the daughter of the Tracy's faithful family retainer.

Her education in America and Europe was paid for by Jeff Tracy as a measure of repayment for her father's loyal services. She graduated with degrees in higher mathematics, advanced technical theory and engineering. She joined International Rescue directly after completing her education, assisting Brains and organising the maintenance of all of the Thunderbirds vehicles.

Tin-Tin's main interests outside her work include water-skiing, swimming and designing her own clothes.

She enjoys a playful relationship with Alan, whom she adores.