And though Yona hesitates to advance their friendship into something entirely new, she cannot bear the idea of ever being separated from Hak or seeing him hurt.

Source: https://www.cbr.com/greatest-friends-to-lovers-romance-anime/

The poster then went on to admire Hak for being able to pick up on Yona's signals as their relationship grows, and how he always seems to know what Yona needs.

Source: https://www.cbr.com/reddit-yona-of-the-dawn-episodes/

Though Hak makes some flirtatious comments to Yona, she thinks he's only found a new way to taunt her.

Source: https://www.cbr.com/romance-anime-where-guy-falls-in-love-first/