Reference for the voice can be heard here!

At first, Ibuki is a bit shocking in bold and unique personality and appearance. She is one of the most upbeat people out of her classmates. She is very energetic and loves to talk, though she almost always ends up going off on bizarre, unrelated tangents. She forgets things quite quickly, so she tries to write memos to help her remember. Ibuki is very quirky as she loves to do all sort of bizarre things and she dislikes "dull" things, like reading and studying. She has a habit of breaking the fourth wall. When she gets upset, Ibuki seems to have a bit of a verbal tic: saying things twice. She also tends to scream or froth at the mouth when she panics. She seems to really enjoy panicking when there is no real danger, like when she's watching horror movies or going into the haunted house.