All the Yonhi headcanons, especially from when Soowon is a little kid, go!
(ok, trying to separate canon!verse Yonhi headcanons from the various AUs I’ve written her in)
appearance: she’s tall and blonde and Suwon gets his looks from her
she’s physically weak, not a physical fighter, but she is (or could be) a master tactician
at the time, she never knew the full extent of Yuhon’s cruelty in war. She learned more after his death, but...it would have been easier to accept if she’d found out while he was alive. After his death, mixed up with her process of mourning, truly believing he was so cruel, that none of it was justified, would be too much like a betrayal. It’s through her that Suwon gets his rose-tinted view of his father
rather than bringing her jewelry as gifts Yuhon would bring her books
she read all of them to Suwon even when he was too young to understand them
she loves playing strategy games and has several ongoing matches she plays by correspondence, some with prominent military leaders in other countries. They don’t know she’s the mother of the king of Kouka. She occasionally picks up useful insights from those matches, which she passes on to Suwon.
she had many failed pregnancies; Suwon was the only one who survived
she always assumed Yuhon would outlive her and was devastated by his loss and for a while didn’t really know how to go on and she was...not really there for Suwon during that time, certainly not as much as he needed (later, he understood, and it only emphasized how important Yuhon was in his mind)
(headcanon: Keishuk is Yuhon’s illegitimate son) Yonhi was happy to welcome Keishuk into her household when she learned of his existence; eager for any additional connection to the husband who left her so abruptly
she and Suwon both learned that Il killed Yuhon through their own separate investigations; neither told the other out of fear the knowledge would destroy them. When they each learned that the other knew the truth, that was when they truly began working together as allies for Kouka’s future, but it’s a very different relationship than the close parent-child relationship they’d had when Suwon was young
