A Speech Therapist put in charge of ensuring Len excels cognitively. Doesn't tolerate distractions. He's a rough + impatient teacher, but not heartless.

-voice: Young adult, irritable voice

I'm looking for the clear instructive voice of an easily agitated young teacher.

-note Hyama is not a Japanese native in this story. From a Japanese family-Yes. It is important to pronounce Japanese words, that appear in his script, correctly. 

However, I will help if need. Example: Tatsuya is pronounced as Tat-sue-ya.