I am dumb, thank you for asking

I thought it was like “dee-zur” or u h “dee-zer”. Could be wrong. English is my first language but I even find it hard sometimes lmao

I can read Korean so if I could look at the raws I would know what his name is

Aaaa, here’s a korean version of chapter 117. I hope it helps :’)
https://tkor.ceo/귀환자의_마법은_특별해야_합니다_117화.html

Thanks and his name is pronounced dejireu ( eu like uhhhh) (j as in Jessica)

WATTT, that’s so different lmao

In my head it's "Dez-ir" like short vowels for both e and i when I read the English translations of both manhwa and web novel.
When I talk about him in my native language (Filipino) it's "Dess-eer" lok