PromiseKun(プロミスくん/プロミス君/Yume Yunako) is an utaite with shota and semi-girlish voice. He normally sings in mid vocal range. In song he changes his pitch range often. He sings notes emotionally and freely, creates different tune from the original song. He has a childish voice which is almost similar to utaite Mafumafu まふまふor kashi どこのだれか from 神様、僕は気づいてしまった (Kami-sama I've noticed).<do not think they're both the same person>
He can sing in a narrow, almost quavering vibrating voice like utaite Itou Kashitarou 伊東歌詞太郎 from イトヲカシ / Itowokashi .
attack | He is known as "The Dying Singer" because his singing style seems as if he is calling the frog after the rain. He also seems like a dying person waiting to be call to heaven, as his singing is sounds more to dying netaite rather than utattemita.