Mogeko are small yellow creatures with feline-like characteristics. They have large ears and a curled tail. They are able to see by thinly opening their eyes. Oftentimes, Mogeko are depicted with more menacing features. They appear to possess razor-sharp fangs evident in one comic. They also appear to have very long tongues.

From mogeko castle

despite his angelic appearance , angel is a very cruel and devious man. he treats everyone as a mere pawn in his twisted  game, giving little to no regard for the consequences of his actions.
he is very prideful and arrogant, and he doesn’t care how many people he has to hurt in order to reach his goals. 