User blog comment:B214/New anime 2017 discussion blog/@comment-97.86.117.132-20161230234256/@comment-26821288-20161231182616

@Omega Samael and Kurenai are kind of different.

Samael was an angel that was cursed by the God of the Bible and thus fell and became a Fallen Angel (at least, I think so. Dunno if it was clarified in DxD, but it should probably something along those lines), whilst Kurenai is a Hybrid between two Reincarnated Devils, Issei and Akeno, the former being a Humanoid Dragon before being reincarnated, and the latter being half a Human and half a Fallen Angel before being reincarnated. So... they are quite different.

And also, Samael was cursed with his poison, so it's kind of unlikely for Kurenai to just have this because he's a Dragon/Fallen Angel Hybrid.