It's been a few months since I looked at this, but I think that event 0 is the player, so if you center something on event 0 it will end up being the player. If that doesn't work though, let me know, I'll take a look at it and figure out a way forward to help.
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It wasn’t possible, there is a block for the ID not to be less than 1. Anyway, the player is not in the map’s event list, I don’t think it would work. When plugins use it in the player, it is usually -1, but if I’m not mistaken, in the plugins they manipulate the Game_Player and when it is greater than 0 the Game_Event.