So i just finished AOT and there are quite a few things i couldn't understand like:
1. why did founder ymir listened to Eren instead of zeke
2. why the one ymir waiting for was mikasa
3. i get that headaches of mikasa were due to ymir messing with her head but what exactly was she trying to find
4. at the end when power of titans was vanished from the world was it because Eren used the power of founding titan to do so or was it somehow related to mikasa killing Eren as Ymir also killed the first king
5. also the reason ymir listened to the royal family for 2000 years was it because of her love for king which i find unlikely since she killed him for her children so i guess it was due to her motherly love but if so then why did she only listen to the royal family and not the other childrens

These are the things i couldn't understand and will be thankful if somebody could explain