Juralumin (ジュラルミン Jurarumin, sometimes translated as Duralumin) is Yotsuba’s teddy bear. Koiwai bought her for Yotsuba when she and Koiwai visited a teddy bear store in volume 9, much to Yotsuba’s happiness as Juralumin was her first stuffed animal ever. The bear is a pale yellow with brown paws, and she has a device inside which makes her able to “talk” when shaken. This usually impresses people Yotsuba shows her to, even Yanda. The name Juralumin comes from Yotsuba’s mispronunciation of Julietta, the name of Ena’s teddy bear. When they were playing Yotsuba would always call Julietta Juralumin, and after Ena had explained that was not the bear’s real name Yotsuba ended up naming her own bear Juralumin instead.