Diluc always presents himself as the epitome of perfection. Despite coming off as bitter and grumpy throughout his speech, he has a gentle, tender, and modest nature. In his childhood, Diluc had a lighthearted and happy nature, the contrary to him now.

He is not fond of alcohol as he does not like its taste and it clouds his mind when he tries to study. He prefers non-alcoholic drinks such as grape juice and apple cider. 

He goes to the same college as you, but you haven't known it.