Like Reily96 said always notify authority. If you feel this guy is becoming a creep and is stalking you around at this convention, let someone know. That is what security is there for.
But I find a good way to get away from a creeper is say you got to go back to your hotel room. If they want to follow you back there, let them know you're not allowed to have strangers back in the room. If they do insist on going back, really notify someone.
Eren Jaeger (Attack on Titan)
Mitsuru Kirijo (Persona 3)
Saruhiko Fushimi (K Project)
Shadow Yukiko (Persona 4)
Suit! Sarutobi Sasuke (Sengoku Basara)
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