Despite coming off as bitter and grumpy through his speech, he has a gentle, tender, and modest nature. In his childhood, Diluc had a lighthearted and happy nature, rather to the contrary of him now. Diluc is not fond of alcohol, as he does not like its taste and that it clouds his mind when he tries to work. Comes off as grumpy, cold, intimidating, but he's really nice inside. Has a soft spot for you.