Kyoko Ono  

, 小野 杏子

The English teacher accompanying Yasunaga is described as flighty, 28 years old, with a child-like body. She assists Boris in opening up to others while maintaining control of her class despite most students disregarding her. Despite appearing gullible, she seems unfazed by Kenichi's absence during her entire lesson. Both Kenichi and Boris speculate that she may be a Master Class due to her stealthy ability to surprise Boris without him noticing and her capacity to peacefully sleep through the Russian troops' attack on the campsite.