
Quick answer — Toshiya Miyata voices Katakuri in Toilet-Bound Hanako-kun Season 2 Part 2, Gerard Wainwright in Private Tutor to the Duke's Daughter, Hansam in The Healer Who Was Banished From His Party, Is, in Fact, the Strongest.
Toshiya Miyata voices Katakuri (Toilet-Bound Hanako-kun Season 2 Part 2), Gerard Wainwright (Private Tutor to the Duke's Daughter), Hansam (The Healer Who Was Banished From His Party, Is, in Fact, the Strongest).
Katakuri is voiced in Japanese by Toshiya Miyata.