Biography
Kiyoteru Hiyama (氷山キヨテル Hiyama Kiyoteru) is a Japanese Vocaloid released in December 4, 2009. He is developed by AH Software. He is meant to be portrayed as a sensei (teacher).
His treble range is supposedly smooth, which allows for an easier usage of the higher octaves. He has the softest of the Vocaloid male voices within the Vocaloid 2 voicebanks. However, he is not recommended for new vocaloid users by other vocaloid fans as his voice can be difficult to work with sometimes.
Biography text from Last.fm, available under CC BY-SA.