I merely ask this because, apparently, some people find it scary: Kingdom Hearts - Television Tropes & Idioms
I personally, have always found the Heartless, while cute, to be just a bit creepy: the scene near the start of KH1, where they chase down some random civilian and steal his heart: it was practically like out of some kind-a zombie movie, only instead of blood and ripped up entrails, we get a glowing love heart... -facepalm-
Overall, I've never really been scared by the series, but perhaps others feel differently?
I personally, have always found the Heartless, while cute, to be just a bit creepy: the scene near the start of KH1, where they chase down some random civilian and steal his heart: it was practically like out of some kind-a zombie movie, only instead of blood and ripped up entrails, we get a glowing love heart... -facepalm-
Overall, I've never really been scared by the series, but perhaps others feel differently?