Random DetCo shower thoughts about characters

So, wanted to ask you guys: what are some random headcanons/idea about Detective Conan characters you've thought of over the time of watching the series?

The catalyst for me making this post was that I realized; Miyano Shiho/Haibara Ai would probably not really like silver jewelry, since it's possible she associates them with Gin (both because 'silver' in Japanese is 'gin' and the color of Gin's hair.) I thought it was neat.

Anything you guys have for various characters, good or bad? Genuinely curious.