Katie lives in the Juniper Hollow district of San Fierro, at the north-west corner of the city, just south-east of the Gant Bridge and the nearest home to it. Although she actually lives there, it is possible that she doesn't like her neighborhood. When Katie decides to do a driving date with Carl, awkwardly when starting (in front of her house), she will say that she doesn't like that place and sometimes says that she doesn't want to live there.
She is a nurse in an ER unit in an unnamed hospital. She has had the job for three years, as she says to Carl during dates. She likes to spend her spare time at the karate dojo in Garcia, San Fierro, San Andreas. It is possible to date Katie before the San Fierro area is unlocked; in fact, this can be done even before the first mission. However, it is recommended to go to San Fierro during midday hours as she's more likely to spawn then.
During random conversations while on a date, she mentions that she's a fan of the rapper Madd Dogg, dislikes OG Loc ("OG Joke is more like it") and is disturbed by the Epsilon Program "nutjobs". She's also fascinated by death and injuries since she loves car accidents and reckless driving, and even asks Carl if he likes to lose a limb indicating she is an acrotomophile and/or an apotemnophile. Some of her dialogue implies that her fascination with death even borders on the sexual (She mentions that working in the ER gives her a "thrill"), possibly explaining her arousal when CJ collides with other cars and implying that she is an autassassinophiliac. However, she states that necrophilia is too far even for her.
Due to her health-conscious image, she likes to eat at diners but avoids fast-food outlets. Katie also likes the shoreline and her mood improves when the player drives by the area, especially by the Gant Bridge. However, she doesn't like the Queens neighborhood.
She can initially be found at the northeast corner of Avispa Country Club at the south end of the city, practicing tai chi 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.
There is a glitch which commonly occurs in the gameplay. If a player dates Katie in one game and starts a new game and does not date her, they can usually find after being wasted that their weapons are still with them.
She is usually at home between 12:00 and 00:00. The following are the possible dating styles when hanging out with her:
Katie has a preference for diners, with the nearest diner being the Paradiso Diner Restaurant next to the Gant Bridge information centre, which is conveniently close to her home. She does not enjoy going to the restaurant located in Downtown.
Despite her dislike of the area, the Gaydar Station club is the closest dance club to take Katie to.
Katie seems to prefer areas close to the shoreline, so options include driving around the area below the Gant Bridge and Jizzy's Pleasure Domes (including the latter's parking lot), or the Bayside area across the bridge. She also loves being driven around in Chinatown. She prefers a moderate driving speed; although she will at times encourage Carl to drive faster, doing so makes her Fun meter drop, and on-screen text will inform the player that they are driving too fast.
She also appears to be aroused when Carl collides with anything, although this doesn't appear to affect either the Fun meter or Progress statistic. Steer clear of the Queens area during this date as she dislikes it. An alternative less time consuming way of passing this date, is to simply drive around Katie's housing block at a moderate speed and you will be sure to pass the date.
Katie will only invite Carl into her house for "coffee" when the date ends (arriving at her house) with a relationship over 52%.
- 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 (except in the HD universe and GTA Vice City Stories, where the player can keep their weapons but still needs to pay). If Carl is wasted in San Fierro, he will hereafter spawn outside Katie's house rather than at the hospital.
- At 50%: Katie will give the player the keys to her white Romero. It has a personalised number plate reading "TRAUMA"; an obvious reference to her job as a nurse.
- At 100%: Katie will give the player the Medic Uniform, which consists of a white shirt emblazoned with the standard medical Star of Life and dark blue pants.
- In some safehouses and other house interiors (accessible in the Burglar side mission), there is a photo of Katie with an unknown man by her. The same photo can also be seen in Maria Latore's apartment in Grand Theft Auto: Liberty City Stories. The man in the photo might be her brother or simply a friend. In the background, the player can notice the Greenglass College in Las Venturas.
- The man himself is simply that of a common rich pedestrian who can be found in the upstate areas of San Andreas.
- In the enhanced version and the mobile port of GTA San Andreas, CJ will always keep his weapons after respawning from a hospital. Thus, the only actual benefit of dating Katie in these version is getting CJ out of hospital for free.
- Although Katie requires the player to be muscular in order to date her, the player can bypass this by having their sex appeal over 50%. This is also possible with Barbara Schternvart.