Yomu Mishima

(eng) Per the author's tweet of 12 November 2020, they previously used the pseudonym わい (Wai); they changed to the current one at the request of their publishers, who thought a more "normal" one would have less impact upon potential sales.

Thus, the current name is also a pseudonym.

They should not be confused with the artist who also uses the nym Wai, found at https://www.librarything.com/author/wai