If I met ran, I'll ask her for karate lessons and her autograph as well. I'd also love to be her friend.

If I met shinichi, I'll force him to tell me when, and why does he love ran. Then I'll ask for a handshake, a hug, an autograph and then I'll kidnap him and bring him to ran till she see him shrink. (or maybe I'll just faint from happiness without even being able to do anything.)
If I met conan, I'll hug him till...I dunno? I'll pinch his cheeks too

and bring him home.
If I met the DB, I'll put poison in an eel and give it to genta. I'll just ignore mistuhiko or give him a moral lesson. Same goes for ayumi. As for haibara, I'll make sure I'll NEVER let go of her from my sight. And hopefully, I can give her a hug. I'll ask her to tell me if she's in love with conan or not. And also what is she gonna do when the BO's gone.
If I met heiji, I'll SPEAK TO HIM IN THE KANSAI BEN! YEAH! and I'll ask for an autograph! XD I wanna hug him but if I do, kazuha might hunt me for the rest of my life. And I'll tell heiji how much kazuha loves him.(I may faint before even doing anything.)
If I met Kazuha, I'll tell her to fight on! And also not to be so jealous easily.
If I met Tagaki, I'll ask him how did he get into the police force.
If I met Sato, I'll tell her that she's a lucky woman.
If I met Megure, I'll ask him if there's a vacancy in their division and I'll ask him to let me fill it up.
If I met Shiratori, I'll slap him and run away.
If I met Agasa, I'll ask if I can live with him together with Haibara. I'll also ask if I can bring his inventions home and also his video games.
If I met Sonoko, I'll tell her that we look kinda alike.
If I met kaito kid, I'll kill him over and over again. If I cut off his head, I'll cut off his limbs as well. I'll make sure he's so dead so much so that when the police come and see the body, they cant tell who kid really was.
And of course, I'll take a picture with some of the characters.
And tell 'em they are on TV.