Favorite number between 1 and 10:
1. Cherry
2. White
3. Rose
4. Ash
5. Owl
6. Cold
7. Robin
8. Raven
9. Shade
10. Cinder

Favorite number between 11 and 20:
11. Cloud
12. Leaf
13. Step
14. Stream
15. Wing
16. Feather
17. Fern
18. Tail
19. Blaze
20. Flight

I got Robinfern.