The monster is a beast

The monster level displays in a color relative to the character's level. Grey levels will grant no exp, green are within a "normal" level bracket, and red are challenging to impossible.

Type

Certain game aspects affect different monster types differently (for example, resonance stones). The portrait displays whether the monster is a beast, elemental, demon, or other.

Name

The monster's name will display in either yellow or red. If the name is yellow, it won't actively attack until it is attacked. If the name is red, it will aggressively attack anyone that comes too close.

Health and Mana

The health and mana bars display directly below the monster name.