She is more than likely on a booster, but may be at her age it could be safer in a seat (I don't have or want kids so it's hard for me to judge) but it's hard to tell against seat belts, mine sits like that in my Zed and I have the seat raised, I'm always pulling it away from my neck, in the supra it's worse and I have to sit on a cushion just to be able to see over the steering wheel and the seatbelt drives me nuts, I have asked for a colour coordinated booster seat but apparently I don't drive it enough lol