balloon (バルーン) is a producer who mainly uses GUMI, Hatsune Miku and flower. His songs featuring flower have gained a sizable reputation, some of which have exceeded over 1 million views.
His most popular work, Charles, has gained over 2 million views on Niconico. Recently, he often does collabs with Avogado6 to produce illustrations for his songs.

Apart from composing VOCALOID songs, he is also known for making self-covers of his own songs, which even exceeded the views on the original VOCALOID upload. Those covers were released in his VOCALOID album.