Yona and the other dragons can, but I don't think he's recognizable as such to the average layman, unless they notice his fangs, maybe? Kurama could probably catch the combined dragon/human scent, but while Kija, Jae-Ha, and Shin-ah's dragon powers are always manifest and involve a physically transformed body part, Zeno needs a stimulus before his manifests and changes his body. But then, the fangs are always present... if I had to guess it would be more spread throughout his body, but also like, not as intense. If that makes sense? However you want to play it is fine by me-- he'd get a kick out of Kurama pointing it out, for example, if Kurama were ever inclined to do so for some reason (?).