Mafuyu is a very hyper and cheery girl, she acts extremely carefree, and attempts to get along with everyone, she really likes almost everyone else in the cast, and will get excited over them doing basically anything, regardless of how questionable it may seem, she has some Tomboy elements to her character as well. 

For Mafuyu, we are thinking a Medium to High Pitch, she speaks in a cheery, exciting manner, is very fond of all the other characters, and shows it in her voice.