Used kohya_ss gui.
Here are some parameters and helpful keywords:
• Checkpoint: AbyssOrangeMix3
• Trigger Word: rumiyokoi
• Weight: 075 - 1
school uniform, white hair, brown eyes
( Sample images only really needed school uniform, but heh, you know how those hair/eye colors can be at lower weights. )
To produce similar results I recommend EasyNegative, this negative embedding was used in the sample images. I'm also using Clip Skip 2 and hires fix.