Who is the man behind Conan? In which episode did it appear?

This is Sera Masumi's "off-court sister" (as the cartoon says). But who is it? I wonder if the author has revealed it now. I haven't read Conan's comics for a while.

Speculation about Zhihu:/question/38410221/answer/76297990

It's good to have you.

Kneel down! ! ! ! Choose a topic from recent major news and major social hot issues to report and plan.

How to write in English in the auditorium of the library?

How many types of e-commerce are there?

19 16 memorabilia

Is Ankang Gaoxin Kangqiao Primary School a good school?

Introduction to the role of Gong Jiedao Qitan

Edit the annual work summary

A little story about tadpoles looking for their mothers.

What is the origin of salon?