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In the first ep. of sign a conversation remeinds me of what happened to piros in the games

Subaru: Are you absoltly sure that the character damage was because of the item that you metioned.

???: Oh I should say so, but my friend was careless as well but he said that guy he traded with was deffenitly a suspicious fellow.

silver knight: please explain.

????: well he must have tampered with his character data he had a face of a cat.

Sorry if this has already been posted I did a search and couldn't find anything.

...How is that a reference to Piroshi?

Since Mia played tricks on him in the game by giveing him items that messed up his character data in the games. It might be him again only as a mention though.

maybe, it might of ment maha because her gender was undefinded at first

This is the report given to the Crimson Knights regarding Macha...

The character appears to be mentioning Piros, or a character that befell the same fate Piros went through numerous times in the game, in which Macha (Mia) tampered with their character's data.

Very clever indeed ^_^

In that case, it's just some random player, and not Piros himself. Piros is a graphics designer for the World, and in AI Buster 2, it's confirmed to be some random player of the World who isn't even given a name with no administrative ability.

Maybe they just wanted to reinforce the connection of Macha and Mia in the game