Shiroi (Shee-roy) has a very big ego and an even worse temper. There should always be a hint of supperiority in any of the lines. I understand that always yelling will hurt your voice so I'll keep the screaming to a minimum , but still add a little volume to any line that isn't in a ''low threatning tone''. And yes , you may take inspiration from Katsuki bakugo [An angry character from My Hero Acadamia].