Chainsaw Man anime has already finished airing episode 12 in Japan, and it was revealed in the ending credits that they’ve cast the Japanese voice actress Reina Ueda as Reze. The character is featured in the upcoming arc, and she made a quick appearance at the end of the episode. You can see cover of Chainsaw Man manga volume 6 featuring her:
Some of Reina Ueda’s most notable roles include Kanao Tsuyuri from Demon Slayer, Shuka Karino from Darwin’s Game, Akane Shinjo from SSSS.Gridman, Kisa Soma from Fruits Basket, among others. You can see a graphic featuring more of her roles below:
The main cast for the Chainsaw Man anime includes:
Crunchyroll is streaming the anime, and they describe the story:
Denji is a young boy who works as a Devil Hunter with the “Chainsaw Devil” Pochita. One day, as he was living his miserable life trying to pay off the debt he inherited from his parents, he got betrayed and killed. As he was losing his consciousness, he made a deal with Pochita, and got resurrected as the “Chainsaw Man”: the owner of the Devil’s heart.
Source: Chainsaw Man episode 12
©Tatsuki Fujimoto / Shueisha, MAPPA