watch 01:51 The Loop (TV) Do you like this video? This article is about a/an half form in Kamen Rider Build. The Sai Halfbody (サイハーフボディ, Sai Hāfubodi) is a biotic A-Side Halfbody of Kamen Rider Build. Accessed through the Sai Fullbottle, its Best Match is the Dryer Halfbody. Matches Kamen Rider Build SaiDryer SaiDryer FormAdd a photo to this galleryFullbottle Sai Fullbottle Retrieved from "https://kamenrider.fandom.com/wiki/Sai_Halfbody?oldid=549725" Categories: Kamen Rider Build Halfbodies Community content is available under CC-BY-SA unless otherwise noted.