She has a mellow, but higher pitched voice. Her mother has rot (fruit cancer), and is trying her best to take care of her in her last days

https://youtu.be/42gsjZQZK4I <------- an idea for the characters voice in this video. At about 1:13 in. Her voice is just a much more shy

Clementine is an old soul in a young body, only around 20 years old. Clementine has a lot on her plate, but takes it best she can, for she lacks the confidence to do anything otherwise. With her adoptive mother being old, and being on her last legs, she tries to spend as much time as she can with the aging woman. But these things take a toll on her mental health, and she has no other real friends, so her mother suggested she try group therapy, to go and meet people.

Extremely shy and meek, Clementine has a squeaky, but very held back voice. She tends to quiver if things get to hard, and accidentally reveals more personal info than is needed more often than not. But being soft spoken as she is, makes her extremely approachable, probably being the kindest of the fruit cast.