anguard Dae-Hyun
The Guardian tutor at Seonhwa, a young lieutenant who trains new recruits on the path of Cheolbyeok.
Dae-Hyun is a younger, fiercely intense lieutenant in heavy armor. He idolizes First Shield Beom-Seok and tries to emulate his cold, unyielding nature. Despite that, he fits the role of tutor perfectly. He always encourages new Guardians to do their best and offers tips on their shield stance when he has time.
Role
As the Guardian tutor, Dae-Hyun teaches recruits who follow Cheolbyeok (철벽, Iron Wall), the path of protection and endurance. The encouraging, hands-on manner he brings to instruction sits at odds with the cold front he copies from Beom-Seok, the Head Guardian he looks up to.
The rest of his history, age, and background are unspecified in current canon.
See also
Source: ETK Lore Bible, Tutor NPCs section (Vanguard Dae-Hyun); Path Leaders (First Shield Beom-Seok) for the idol he emulates; Haneul foundation doc for the Guardian/Cheolbyeok path context.