Looks like ?/Koi is another character that Big5 search doesn't recognize, e.g.,
Gai Ming-Hui / (???)
Gai Ming-Hui / (???)
http://hkmdb.com/db/people/view.mhtml?i ... ay_set=eng
http://hkmdb.com/db/people/view.mhtml?i ... ay_set=eng
ref.
https://zh.wikipedia.org/wiki/%E8%93%8B ... 4%E6%9A%89
https://www.facebook.com/JoyceKoiMingFai/