Reasons why do I think Zuko is a walking green flag (according to what I have noticed within the show):
1. Always feels guilty after doing something that contradicts his principles.
2. Listens to his uncle despite the differences and always turns to him whenever the time calls.
3. Never ever harms the children unlike many of other fire nation soldiers and generals.
4. Lets Uncle Iroh play Pai Sho.
5. Keeps his trauma inside his heart, and even when gets provoked is extremely worried about troubling others with his inner conflicts.
7. Lets Appa free and earns Appa’s trust.
8. Doesn’t feel ashamed in working at a tea shop despite being the heir to the fire nation’s throne.
9. Cares for Azula despite her wrongdoings.
10. Is ready to apologize for his faults.
11. Never forgets his duty toward Mai despite his suffering.
12. Is even ready to breakup with Mai to save her.
13. Is an extremely loyal and encouraging friend.
14. Doesn’t hesitate a bit to stand with the right, even if it means challenging his own father or sister.
15. Loves Uncle Iroh so much.
16. Never forgets his mother even after years.
17. Makes sure that the fire nation finds a new way of fuelling their bending other than anger.
18. Preserves the lineage of the dragons and honours them.
19. Hard outside, kind inside.
20. Puts himself at a risk by using fire bending to light up the fountain in Ba Sing Se in the days of wartime asylum just to make Jin happy.
21. Has a very empathetic nature and votes against fire nation waging a war on others in the council of the firelord himself.
22. Is determined to accomplish his goal whether it’s catching the avatar or saving the world.
23. Never tolerates bullying.
25. Is hot with a hotter voice (thank you Dante Bosco for being the perfect Zuko) and a freaking cute smile.