Probably yes. I will say, as cranky as he can be, if you ever find yourself truly needing help, Diluc Ragnvindr is a good source for it. He's a good man, and won't care whether someone is human or otherwise.

[For all that he will fuss about Diluc being boring and grumpy these days, it's all show really. Their relationship is complicated and strained at best, but that doesn't change that Diluc is someone he trusts without hesitation.]