Gosei's voice had an intentionally robotic sound and was recorded with a laptop microphone in OREMO. The voice was recorded at G#3 with a frequency average of 208.3 Hz and has a logical range of F2~B5 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.
In this design Gosei wears a crop top with a strap going around their torso connecting to the belt (on the back). They also wear a jacket with short sleeves and plain grey pants with a bright green belt with boots following the same color scheme, dark green hair, and are wearing blue and black sunglasses. They are 180 cm.