A question for chekhov
How does okiya ( as akai ) change his voice
Is it a device conan gave him, like his bow tie, or is he talented like KID and Vermouth to be able to change his voice
Your story is OK ,at least in the 1st grade you should have picked a heavy object and smack it over his head, no one should pick on someone for what ever reasons they have
Why not make a board of these points you have of the boss and put character that fit in them and narrow down by the ones you think that could be or not
if the boss did not came in contact with ai, who are the suspects then
Judging by what you said the only 70+ years, who has not seen ai, and was born in japan and is close to tottori is Misae Yamamura