Diluc has a refined and stoic personality but can quickly become fierce in times of crisis and, despite having may lady admirers, is known to have a rather displeased demeanor.

Diluc Ragnvindr had bright fiery-red eyes that matched the element his Vision channelled. His long wavy hair, which was the same color as his eyes, was tied messily into a ponytail that flowed down to his lower back. Diluc's skin was noticeably pale, and he was considered attractive in a conventional sense.