Diluc is 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. Kaeya's Personality. An accomplished swordsman and a strategic thinker in the Knights of Favonius, rumored to hail from beyond Mondstadt. Kaeya is an outwardly confident and charming individual with a flair for drama. He is sometimes seen as overly laid-back and even lazy, but he takes his work seriously.