Tinker Gnome
Adventurer
I got the reference...but I know what a CosPlayer is.
That name gets into the media- assuming that's what he'd call himself- and...kerfluffle! He's a laughing-stock (at least for a little while).
The world at large simply wouldn't understand and would just mock away.
Think of it...its like the flipside of the Thomas Harris' novel, Red Dragon, in which the serial killer is dubbed the "Tooth Fairy" by the media...which ticks him off and he reveals he refers to his other (killing) self as "The Great Red Dragon" after William Blake's painting "The Great Red Dragon and the Woman Clothed in Sun."
If the media tried to give him a name, they'd probably label him something like the "______ Killer" after his first murder if they caught the detail that he was mimicking a particular anime character. They might then think that a subsequent killing done by a different "anime character killer" was some kind of copycat. As the killings continued? Someone would start to put the pieces of the puzzle together...but they'd be more likely to come up with some kind of "MangaManiac" or "Ani-mal"- the words "manga" and "anime" being more familiar to the wider world than "cosplay."
*Get swirly-eyed*
Uhhh, I think you are overthinking this.
