During the training camp, Shirayuki is in charge of coaching the Infighters, this includes Hanabi. After Hanabi officially becomes a Keijo player, Shirayuki becomes Hanabi's mentor. Hanabi starts to address her as "Onee-sama". In turn, Shirayuki calls her by her first name, "Hanabi".
Kobayakawa seems to be Shirayuki's mentor in the past. When introducing Shirayuki to the Elite Class members, Kobayakawa praises her. While Shirayuki tells her not to exaggerate it.
During the training camp, Shirayuki is in charge of coaching the Infighters. She mainly focused to guide Nozomi. Shirayuki is the one who taught her the "Butt Flash".