The promised neverland and Attack on titan are very similar and here's some things they have in common
2. The demons/titans
3. They both have 3 main characters and they almost have the same personality, Emma is like EREN. JAEGER , Ray is like Mikasa and Norman is like Armin
4. Ray betraying the others/ Reiner betraying the others
5. Emma is (well was) trying to stop norman to commit a genocide.. and the aot characters are also trying to stop EREN. JAEGER (I LOVE SAYING HIS NAME) to commit a genocide
YEAH that's all I guess...