Cast & creator
Koki Koyasu
Best known for Re:ZERO -Starting Life in Another World-, Dan Da Dan, Call of the Night
Koki Koyasu is a Japanese voice actor. He is the son of popular voice actor Takehito Koyasu and a member of his agency T's Factory.
Also known as: Kouki Koyasu, 子安 光樹, Kōki Koyasu, 子安光树
Movies
0
film credits
Series
11
television credits
Career
11
2016–2026 · acting roles
Credit score
7.2
average across scored titles
Signature credits
Known for
Across film & television
Filmography (11)
Showing 11 of 11 credits
Series
★ 8.1
Re:ZERO -Starting Life in Another World-
Roswaal B. Mathers (voice)
2016
Series
★ 8.5
Dan Da Dan
Male Student A (voice)
2024
Series
★ 7.7
Call of the Night
Kai (voice)
2022
Series
★ 8.6
Demon Slayer: Kimetsu no Yaiba
(voice)
2019
Series
★ 8.6
Toilet-Bound Hanako-kun
Male Classmate A (voice)
2020
Series
★ 6.5
I'm Standing on a Million Lives
Nomura (voice)
2020Series
★ 6.5
I'm Standing on a Million Lives
Maccahee (voice)
2020
Series
★ 5.3
Hortensia SAGA
Camellia Soldier (voice)
2021Series
★ 5.3
Hortensia SAGA
Soldier (voice)
2021Series
★ 5.3
Hortensia SAGA
Church Knight (voice)
2021
Series
★ 9.0
Reiwa ni Kannou Shousetsu Tsukuttemasu
Oizumi Aoi
2026