Castiel. When the same name comes up in conversation, Yukio takes a breath, carefully measured but relieved, in a sense. Not because it really makes any true difference, but because it gives Yukio something of an idea about the being. Robin is, if not necessarily someone who would ally himself with Yukio, still a more objective third party than the words dropped from the angel Castiel's lips themselves.

"The second angel, Castiel, came across as the greater threat," Yukio says, holding his gaze level. There's no point denying the threat when it's been waved in front of him like a red flag upon their very first encounter. Conceding his wariness might yield more information.

"Proceeded to list various feats he is capable of, though that worries me less than what motivates him in this city. You say less human, less mortal. It doesn't sound that you think too positively of such traits."