Writing sins, schizophrenic character development.

Welcome to writing sins.
Here, i point out mistakes stories can make in hopes of dissuading people from making them.
schizophrenic character development is what happens when characters flip flop from personality to personality, trust to trust, ect. ect. this can be seen in stories like after the honeymoon. This causes unlikable characters and incomprehensible plots.
Example from After the honeymoon include characters suddenly trusting and then not trusting chrysalis.
The best way to avoid it? understand your character's.
you have to know what goes on in your characters head. if he or she doesn't hold a grudge, has anger management issues, all that jazz.
if your character stops trusting someone after large amounts of revealed lies and evidence stacks up against that character, your okay. if characters suddenly don't trust another or anyone else for no reason at all, your story is suffering schizophrenic character development.
with that, i'm Nova Shino, and see you later.