Gosei's voice had an intentionally robotic sound and was recorded with a laptop microphone in OREMO. The voice was recorded at F3 with a frequency average of 171.5 Hz and has a logical range of A2~G5 according to UTAU. However, C#3~G4 is more accurate. Going out of this range is perfectly fine but it is not recommended that you go over C6. The voice includes screaming files.
Gosei GRUDGE has white and green hair, a green jacket with a grey crop top, and mismatched pants with one boot and one thigh-high boot. They also have fingerless gloves and red sunglasses.