Kagami originally won Goldy during a summer festival during episode 5 of the anime. Goldy was the only goldfish within Kagami's reach during the game, and was caught (presumably) on Kagami's first and only try. Goldy is then brought up in episode 15 during the cherry blossom festival the next year; apparently Goldy has done quite well and has grown significantly, and to an extreme, since being caught. Goldy has grown so well, in fact, that Konata remarks that at it's size, Goldy can't be a goldfish. When last seen, Kagami has pleged to put Goldy on a diet, citing Konata having made a comment about an anime, as being the cause.