I think what I find most striking about Peridot’s character development is that she’s learning all these wonderful lessons about love and empathy and friendship and so forth…
… but she’s still a whiny, narcissistic asshole who has to constantly restrain her penchant for reflexive cruelty and consciously remind herself that people have value even when they’re not her friends.
Because, you know, a person’s basic personality doesn’t change that fast.