I think she is a great singer though she doesn't have a powerful voice

she could be better if she didn't have so many horrible songs to wash out the good ones... For instance, if her debut album was:

momo no hanabira
rocket sneaker
sakuranbo
kingyo hanabi
360
planetarium
kurage nagareboshi
peach
cherish
biidama
love letter
yumekui
onextime
neko ni fuusen
pocket
ai

(give or take a few), she could have been amazing. She is already very successful, but she couldve been better