Audience-Alienating Premise: An example that runs both ways; the usual target audience for furry visual novels may find themselves turned off by the novel's depressing tone and focus on a horror atmosphere over a romantic one, while those with an interest in horror media but none in the furry fandom aspects will likely lose interest for having too much in the way of furry romance.
Complete Monster: James Hendricks, a wealthy ram who lived in the eponymous town of Echo in the 1910s, also happened to be a pedophilic Serial Killer. When the townsfolk found out about the childrens' corpses, James scapegoated his own lover John—who, being a desert fox, was analogous to a Native American—having him lynched. Flashforward one century later, and James's ghost possesses his descendent Carl in the route where he is the Love Interest, altering his personality and making him have a relationship with Chase Hunter—possibly against Carl's own will—for the express purpose of manipulating him and helping him defeat John. Eventually he settles on sending the gang to a spirit dimension where he intends to kill them, and is only unable to do so thanks to John's interference and our heroes finding out the whole story, banishing James's spirit in the proccess. James may also be the antagonist of the T.J. route, where a spiritual entity possesses Chase and makes him possessive of T.J. and violent, all to put him in a situation where he'd be forced to be the spirit's pawn and kill Flynn for seemingly no reason.
Harsher in Hindsight: Pretty much anything involving Sydney's death becomes this after the end of TJ's route, where it's revealed that Chase himself was the one responsible; not to mention how some of the more negative things we hear about him come across after the scenes in Flynn's route that show flashbacks of Sydney's terrible home life from his perspective.
Another example involving Sydney is the fact that Chase's internal monologue during a flashback near the end of TJ's route cites his belief that Sydney killed his own father deliberately as part of the reason for killing Sydney to protect TJ from him. Except that, as it turns out in Flynn's route, while Sydney was present at the scene where his father was killed, it was because he was trying to stop him from shooting himself and at most pulled the trigger by accident in the resulting struggle, meaning that Chase's interpretation of events was completely off.
The Woobie: The entire cast has Woobie points in some way, but special mention goes to TJ for being considered something a Woobie in-universe by the others (except for Flynn, who resents the special treatment he gets and its role in preventing him from learning the truth about what happened to Sydney).