- a whole strange cute anime/furry/Hello Kitty/Kpop on one side and something very dark behind.
Just to reiterate: these things appeal to children BECAUSE they are cute and childlike. The very dark thing behind is the people who go to the things that children like and use it to access potential victims.
Parents do not need to worry about children because they are into cartoons, anthropomorphized animals, or KPop (or youth organisations like Guides). "Kawaii" is an understood term among most school age children, I've found. It's in the same bracket as unicorns, rainbows, llamas and reversible sequins on clothes.
They do need to be aware that the Internet allows children to wander all over the place in a virtual sense and run into people who may be specifically looking to target them. And those people gravitate to what kids like, because that's where the kids are.