Japanese superhero

I honestly dont know much about Gundam，but in places like Akihabara（the'otaku'aka geek capital of Japan）saying so is a jailable offense.
Many people collect pratically anything Gundam and so even carry something like a poster sticking out of their backpack to resemble Gundam｀s sword. It｀s an all out obsession with some.
I just think it looks cool standing there 3 stories tall.
ps dont say its a robot they get pissed its a mobile suit and some gets inside to run it apparently