>>103558919The most popular theory is that Arthur was just jealous of either Vivi or Lewis, but I don't think that's necessarily the case. Not entirely, at least.
But I think that the real source of Arthur's issues is that he was pretty much the odd guy out. Not only what
>>103558365 this anon said, but also... Well, the van is Arthur's. He's the mechanic, he built it, he's the one who drives it and repairs it now.
But back before the cave incident, Lewis was the main driver (as the Fred, naturally). Vivi was Lewis' girlfriend, and since Mystery is Vivi's dog, it seemed like everything became more and more centered around Lewis. Combine that with Arthur not really feeling the Supernatural stuff, and I guess he just felt like his own best friends were drifting away from him, and Lewis was at the center of all that. Lewis was probably Arthur's best friend back before this all started, along with Vivi and Mystery but Vivi and Lewis getting together altered the group dynamic and skewed it in Lewis' favor. To Arthur, deep down, he might have ended up feeling like he was losing everything to Lewis. Even his own van.
This put Arthur in a state of emotional turmoil, and loneliness. When they explored the cave, the green spirit fed on Arthur's emotional turmoil, turning it into bitter hatred and resentment towards Lewis, which turned into the green spirit driving Arthur with murderous impulsive rage to kill Lewis, the guy who pretty much took everything from him.
But before it could consume Arthur entirely, Mystery bit off the arm, where the possession started, saving Arthur but probably leaving him very confused and hazy on what happened in that cave. All he knows is that Mystery turned into some demon and bit his arm off, and Lewis is missing. It's probable that all his emotional turmoil was also removed through that spirit being severed, combined with Lewis' absence. Leaving Arthur with pretty much gaining everything back. But, now Lewis is in Arthur's place.
