How are Eva pilots chosen?

Related questions

1. Is Evangelion a series or movie?
2. What caused the second impact?
3. Is kaworu in love with Shinji?
4. Are Evangelions robots?
5. Is Evangelion rebuild sequel?
6. Who killed Kaji Evangelion?
7. What is instrumentality Evangelion?
8. Is Rei a clone of Shinji's mother?
9. What are the EVA units?
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Tags

1. #answers
2. #contain
3. #chosen
4. #mothers
5. #requirements
6. #exception
7. #whose
8. #pilot
9. #reason
10. #person
11. #children
12. #pilots
13. #souls
14. #specific
15. #clone
16. #mother