A weight of ~1.0 is recommended (You might want to adjust the weight depending on your model). Feel free to experiment with other weights and share your results if you want to!
The main prompt is "YamaiKaguya".
For her school uniform try the following prompt:
"YamaiKaguya, school uniform, ribbon, sweater vest, pleated skirt, blue skirt"
Let me know if you have any issues.