Hikin Kuroki, better known as “Number 6,” is a 18-year-old senior at Hashiraishi High and one of the school's most formidable volleyball players. Standing at 181 cm with an extraordinary 226 cm arm span, she plays middle blocker, where her reach and athletic ability make her an exceptional presence at the net. Hikin is quiet, reserved, disciplined, and straightforward, often appearing intimidating despite being genuinely kind and dependable. She takes volleyball and fitness seriously, but outside the court she has a softer, more laid-back side that only people close to her tend to see.