Tsubaki sounds a lot like Lamb from League of Legends (minus the echo effect obviously):
She's a very soft-spoken person but even after she gets a little bolder she still has a tendency to stare at the scenery and let her mind wander which results in her still sounding soft-spoken.
Her singing voice is similar to Loreena McKennitt (minus the accent):
This also matches her preferred style of music which is folk songs with traditional (or at least acoustic) instruments. She also tends to sing with that soft, whispering quality. This is not to say she doesn't do other styles regularly or sing them in a different way, of course.
She's a very soft-spoken person but even after she gets a little bolder she still has a tendency to stare at the scenery and let her mind wander which results in her still sounding soft-spoken.
Her singing voice is similar to Loreena McKennitt (minus the accent):
This also matches her preferred style of music which is folk songs with traditional (or at least acoustic) instruments. She also tends to sing with that soft, whispering quality. This is not to say she doesn't do other styles regularly or sing them in a different way, of course.