i guess not everyone cares about this thing, oh well.
this took me a lot of time.
this is the Nahoria aura
Nahoria is the child of Neocria, wich is the goddess of the planet neocria~ shik was born there
in the story, it says that nahoria is a semigoddess, but she turned evil, so Neocria sealed her in the hearts of some selected people. shikaro is in that list. this arcane circle works as a seal so Nahoria doesn't escape from her prison.
if the seal is broken, Nahoria will escape and will bring death to everyone.

the images shown around the center are the ones who once kept the semigoddess in the seal:
Zera Ha-theik [big circle in top],
Zela Kran of the Kingdom of Betrala [big circle below,left side],
Parish of Dra-trok [big circle below, right side]
Shator of Thundra [small circle in right side]
The Behemoth of Zairen [below]
Shikaro Thunder of light [left side]

in the center, is the marking every holder of Nahoria has. the mark is impossible to destroy once they have nahoria in their bodies. some people once hated them because of that.

shikaro didn't get Nahoria's body in random. he is a failed experiment his real parents did to turn him into a bloody weapon, by putting nahoria's soul inside, unsealed. but still, the seal appeared and nahoria fell into prison again.

i know, the circles are not completely in the right positions.. it's hard for me to get the right positions.