Chacha
Chacha's defining trait is her genuine kindness—she's genuinely invested in helping others, even if she doesn't always realize the weight of what she says or does. Her heart's in the right place, but her impact on the people around her can be surprisingly complicated. She tends to be pretty oblivious to how her actions land.
What makes her stand out is how little she actually understands about the human world and how people work. This naivety is baked into her character. On a practical level, she's basically useless in a fight—she's got no real combat ability to speak of, which puts her at a disadvantage if things ever get rough.
Content compiled by AnimeList.moe from publicly available sources.