A young female unicorn created by Osamu Tezuka and Sanrio from the Unico manga series. Corn/Kon is the older sister of Unico (her younger brother) and oldest of Unico's siblings that he encounters in the original manga series. Debuting in the "Hometown Visit" chapter, she initially developed a major crush on Unico before discovering from her mother that she and Unico are siblings and insisted on giving him a "Love Flower" in the process. While disappointed at first, she decides to love her younger brother from a "romantic love-way" to "family-way".

Despite this, Corn's heartbroken knowing she won't love Unico in a romantic way and resorts to binge eating which causes her to gain tons of weight. After falling in love with someone else, she quits acting resentful towards her brother and is saddened that her older brother has to leave near the stories' conclusion. After witnessing the West Wind taking her young brother away, she cried for a long period that she ends up losing weight reverting back to her cute and pretty self.