My Daeron II Headcanons(cos there is not enough about my homeboy!!!)
1.Young Daeron II, reading books on dornish culture, while he was young, cos he wanted to know about his future wife's history and culture.-It was during this time, that aegon iv started calling him bookish.
2. Young Daeron II serving as Viserys II's cupbearer.(Maybe GRRM will change that who knows, should wait for fire and blood part 2).
3. Young Daeron II writing letters to young Myriah Martell to try and get to know her. They have been betrothed since they were like 5 no?
4. Young Daeron II gets nervous about meeting Myriah Martell and tries to not leave her side and defends her against his father. Bc he was raised by his mentally strong mama🤘🏼
5. Young Daeron II, getting bullied by his father on his wedding day feast, asking him if he even knew how to be a man to his wife. To defend himself Daeron replied that he "knew what not to do to his wife."-this response led to the further deterioration of their already bleak relationship.
6. Daeron II trying to pour his love to Baelor, as he knows what it felt like being his own father's heir and being sidelined regardless, hated even, considered a bastard for looking like his mother more*.(Not just that I know)
7. Daeron II letting Aerys do his own thing on reading and ignoring courts jabs on having a bookish son, knowing how it felt like having his own father belittle him for being bookish.*
8. Daeron II letting Maekar marry for love knowing he could've used him to marry for another kingdom(the Reach,Westerlands or the North.)
9. Daeron is extra gentle to Rhaegal bc of his outbursts, and not sending him away from court(which would've been understood at the time), but rather letting him be situated with him at his own high seat, so he could be with him bc it would be easier to see his progress in health.
10. Daeron II, verbally defending his mother against accusations of adultery. He knows his mother, a devotee of the faith, who wanted to be a septa, wouldn't have had sexual or romantic feelings for her other brother, just bc they got along better, than the brother-husband, Aegon IV(who canonically maritally rapes her, with the hope that she should die.)
11. I just know Daeron II low key is a switch.
These are just my own personal headcanons ofc we don't know how GRRM will write about his full persoanlity in fire and blood part 2 untill he releases it