ohh hmm...if it affected him to the point of changing his appearance, Sion might ping Nico. the remnants of death hanging around him or some such dramatic thing. NOT SURE if Nico can sense other people can sense things, but (wow it's been a while, Bleach) Ryuuken might ping as an Underworld monster a-ahahaha since he won't know what the feeling actually means. That sound about right? Since Quincys deal with Hollows too and wow I forgot how much they do. So it'll just be a mild thing.

OH MY GOODNESS IT'S SO CUTE i mean. Nai is safe then!! :Db and AHHHHH KANDAAAAAAAAAA AHSDFIOASHP yes good they can have glaring competitions omg