Buby is an Aurora Girl who makes northern lights together with her kind. She is banished from Aurora no kuni (Aurora Land) because of her selfishness and horrible behaviour, and she is told to find a stone called Aurora no Shizuku that can grant three wishes. That way she will be forgiven. Ruby meets Anpanman and lies to him that she needs the stone to rescue her land. But when Baikinman is also interested in getting the three wishes, Ruby is torn between the choice of helping her new friends or being able to return to Aurora no kuni.
Ruby is one of the Aurora Girls responsible for painting of the auroras in the sky. She is banished from her homeland due to her selfishness and is told that she shall be forgiven if she is able to find the Aurora Drop, a mysterious item able to grant three wishes to whomever holds it. While searching for the hidden object, she meets Anpanman and his friends. They embark on a voyage to assist Ruby, but Baikinman and his gang are set on reaching the artifact before they do.
紅寶原本是和極光女王一同彩繪美麗極光的極光女孩，然而她十分驕縱任性，有一天終於因犯了極光之國的戒律被趕了出來，她想回去惟一的希望就是黑石島上的極光水滴許願石，一路上她都隱瞞著被趕出來的事實謊稱是為了拯救極光王國，對奶油麵包小弟和其它人十分不客氣，但是當她看見麵包超人及所有的夥伴為了她出生入死，面對唯一一次許願的機會，她選擇幫助大家，這樣善良的改變，終於讓她回到了極光王國。
