Haitani is one of Keitaro’s only friends from his exam classes. He and Shirai usually show up to taunt Keitaro or to offer their “advice”, which usually makes things worse. Haitani is taller and thinner than Shirai or Keitaro and is also hinted at having slightly better relations girls. He is also the first one of the group to make it into college.
Epilogue
Haitani and Shirai are the announcers at Keitaro’s wedding.