Based on the wiki, "Kurumada is brusque and does not trust people easily. He tends to banter with others and occasionally refer to them dismissively."

A deep-male voice that has aggressive tone in his voice, oftentimes shown to be laid-back and even a bit of a bully, teasing the others. 

AUBIBLE REFERENCE:
https://youtu.be/2mxtTCe_N5g?si=QfIgqjbimwSO81Bh&t=361

This is just an idea on how we'd like the character to sound like, and voice lines we'd like to hear to truly picture the ideal voice. It is completely optional, discord is a requirement.