The Hot Springs Episode has a Magii hiding in the form of a marble lion head waterspout that's been in the background the whole time. Except... Japanese hot springs shouldn't have a Western-styled marble waterspout, so this should have set of some warning bells well before that.
Geki's an avid gamer who's most likely Really 700 Years Old. And his weapon behaves like a pinball - one of the earliest things gamers are known for. Heck, you could argue that it acts like a billiards ball, which is even earlier.
