From Grand Theft Wiki

Katie Zhan

Katie Zhan is one of Carl Johnson's optional girlfriends. She is a nurse who also spends her spare time at the karate dojo in San Fierro, San Andreas. Due to her health-concious image, she eats at diners but avoids fast food restaurants. She is also homophobic and doesn't like it when the player drives by the Queens neighborhood, a gay, lesbian, bisexual, and transgendered district. Katie also likes the shoreline and her mood improves when the player drives by the area. She is also fascinated by automobile accidents and is easily aroused by reckless driving.

Katie is voiced by China Chow.

Locations

She can initially be found at the northeast corner of Avispa Country Club at the south end of the city, practicing martial arts behind some bushes. She can be seen easily from the road. Katie likes men with sex appeal and muscle, so bulk up before asking her out.

Home

Katie Zhan's House in Juniper Hollow.

Katie lives in the Juniper Hollow district of San Fierro, at the northwest corner of the city, just southeast of the Gant Bridge. She is usually at home between 12:00 and 00:00.

Rewards

• Dating Katie will allow the player to get out of the hospital for free, and they will also get to keep all of their weapons after dying, a form of universal healthcare not found in other Grand Theft Auto games.
• At 50%: Katie will give the player the keys to her white Romero.
• At 100%: Katie will give the player the medic uniform, which consists of a white shirt with medical symbols on it and dark blue pants.

Trivia

• Katie's car has the license plate reading "TRAUMA" suggesting she works with trauma victims in the hospital.
• If the player takes her on a driving date, she will encourage Carl to drive faster, but strangely, if the player does so, the "fun" meter will go down, and the text will appear informing the player that they are driving too fast.