I had a weird dream that I absolutely had to make into proper OCs, forgive me for making more.
This was roughly the dream:

Holo (left) is a space traveler, and he and his crew ended up stranded on a planet. The planet has a gladiator-style game they use to solve all sorts of problems and debts, where the goal is to pin and then strap a muzzle/collar device to your opponent. In exchange for ship repairs, Holo agrees to join the games

His opponent is Lire (right), a simple factory worker, who joined the games to pay off a debt. Unfortunately he's much weaker than Holo so he gets muzzled almost immediately, and the match is over

At this point the muzzle/collar device malfunctions, and Holo is told that it isn't simply a restraint, but a machine that floods the loser's brain with mollifying chemicals to make them more docile. When the device malfunctioned, Lire's brain was overloaded and it caused damage, to where he now makes tons of errors, can barely function, and thinks his name is Kopi now

Holo is a respectable man and agrees to take responsibility for Lire/Kopi, and will take him out of the lower district and up to the rich districts where the best doctors might be able to fix him

And sadly I woke up there so I don't know what would have happened, but conscious me can write my own ending I suppose!