Don’t annoy Raikuen to much or you’ll make him very angry. He might turn you into nothing but some charcoaled remains or even less than that.

Here you can see how his facial muscles tighten. Also his antennae with the electro receptors at the end are tenser. There are probably also some small electric shocks coming from them.
The electro receptors at the end of his antennae are able to pick up electric waves out of the air about the same way as sharks do in water. Besides that they can also send out electric waves to search around in a small area. It’s pretty hard to sneak up behind a dragon because they can sense the electric activity in your nerve center.
Let’s give more info about his horns. Dragons have a couple of horns coming from the back of their head. The upper one is the fire spike horn, the one in the middle is the saw blade horn and the lower one is the scythe horn, all of them obviously named after their shape.

Art and character © Raikuen