"Iroha" is the old Japanese variant of "ABC" (as seen in the Japanese iroha poem) and "I, Ro, Ha" means "A(La), B(Si), C(Do)" of seven-note scale.
She is illustrated by okama, a Japanese manga artist and illustrator.
Iroha is one of the "kittyler" characters who love the Sanrio character Hello Kitty. She also joined the "Hello Kitty to Issho!" project in early August, 2010.
In October, 2010, Vocaloid2 for her was released, offering two demo songs, and her appearance and name were also released. Her voice provider is unknown. However, it is said that she is a professional singer who passed the audition test of AH-Software.
A CD is set to be released with two songs ("Tsubasa" and "ABBEY FLY") featuring her, along with VSQ files. She owes much of her early use to being supplied as a trial version. The offer for the free trial ended on September 30th 2010.
Iroha has a deep, strong, and powerful voice which does not give her a "child-like" feel like that of Yuki Kaai, as Iroha's voice provider is a professional singer, and thus she is intended to have singing prowess. She is capable of singing fast-paced songs and has clear, strong consonants and good, smooth Japanese pronunciations. With a wide-ranged voice, she can sing in both a high and low tone and has the ability to sing in falsetto. Some users say editing her parameters and waveforms is much easier than with previous vocaloids.
As her default vocal setting is a low-tone voice and many users tested her in this range, many of her early songs had some listeners judging that she sounded less feminine and "tomboyish". However, some songs now feature her with a high voice and feminine voice.