I've only just started getting into Part 2 of Update 0.4's content, but I think I know enough to confidently say that at least half of these characters would fit into a mental asylum.
Every single character is such a strange yet unique goober. 90% of them likable in their own unique way. While others are completely confusing or rage inducing. Well... The only one I genuinely dislike (and find rage inducing) is Hazel, everyone else fits into "confusing yet likable" or "weird yet likable," Hazel is still interesting don't get me wrong. I just feel like everything she says/does is a lie and her cheerful/kind demeanor is but a mask hiding an actual demon from Hell. And it's quite easy to see why I feel that way as her demonic side seeps through the mask pretty often. It's especially made clear as she's the one character (so far) whose points are consistently locked behind events, you cannot endlessly repeat her basic hangout events to farm for points as they seemingly ONLY increase when doing her actual unique story events. I'm still interested to see who she actually is, and as such will continue interacting with her though.