I guess you could argue that the Serph we play as is in fact entirely a fictionally constructed personality and he is a good dude (because Sera thought the real Serph was the best person ever as she thought he was nice even though his opinions seemed to be "ethics, pssh, what I want is results and I'll manipulate her to get results but who cares about her -feelings-"), entirely separate from asshole real Serph. (At the time of Digital Devil Saga 1, all the "original people" Sera remembers from the lab are dead, having mostly murdered each other basically. The Embryon are quite an ironic tribe when you consider they're tiny and mostly consist of people who killed eachother. These constructs based upon her skewed views later exit that Junkyard and enter the real world.) Poor old Heat gets re-imagined as angry asshole man when actually she only remembers him being aggressive for him calling out Serph for being The Biggest Asshole to her.

There are some really good ideas in the Digital Devil Saga games, but they're also really weird. (At one point you basically do a fusion dance and also there's a cat who's kind of you. And did I mention that in the Junkyard they're all technically cannibals (though mostly as they turn into demonic cannibals)? Like seriously, it's a plot point. Argilla refuses to be a cannibal for a while and therefore can't learn new skills, because only eating people gives you knowledge! DIGITAL DEVIL SAGA.)