I'm not really sure what to say about her. She's pretty known for her hair (yes, even a lot more than her singing skill), and it seems to me that she fakes out her actual age...
Most of her songs are not bad but I do like "amairo no Kami no otome" and "Viola", these two songs have a very unique sound and nice beats. By the way, the "ANGELUS -ANGERASU-" (why does she always like to repeat her song titles twice in English and katakana?! -_-) and "tsuyoku + LOVE LETTER" PVs are linked together, so it's worth a watch.