The youngest Ayase sister, Ena is a few years older than Yotsuba and her most frequent playmate. She is sensible for her age and tries to be responsible by recycling and limiting her use of air conditioning. Her attempts to spare Yotsuba's feelings sometimes lead her to make little white lies, such as praising Yotsuba's childish sketches or letting her believe that Miura's cardboard costume is a real robot named Cardbo (in ADV's translation) or Danbo (in Yen's translation) (ダンボー, Danbō?), with consequences that rebound on herself and Miura. Ena likes drawing, something at which she is quite skilled, and playing with her teddy bears, either by herself or with Yotsuba. Ena is unsqueamish and even enthusiastic about such things as handling large frogs and gutting live fish.