Note: You can only fight Possessed Arius as Lucia. When you get to the second to last mission (after the part where you are in the Big Urobos Buildiing Corps.), you will have to fight Possessed Arius. He is also in Devil Trigger Mode. To defeat him, find the Embaka and have it upgraded to at least level 2 or 3. Have your Arsenal, Throwing Daggers, upgraded to level 2. While fighting, keep jumping in the air and pressing Square rapidly until you fall. At least every five to ten seconds, Possessed Arius will charge up (purple flames will form around his body). He will charge at you. Jump in the air and keep pressing Square. When he is behind you while you a're in the air, he might jump at you on the ground. When he falls, attack him with Triangle. It is the best way to get your Devil Trigger gauge at full power. If your Devil Trigger gauge is half to full, go into Devil Trigger mode. Keep attacking him; you will rarely ever fall down while you attack in Devil Trigger mode. When his life is in the red, he will take one of the pipe-like things on his back that always move and jam it into the ground, causing it to pop up occasionally, He will not die, but will transform another time.

You do not need to have anything leveled up for this trick, but you will need the Speed Amulet. Equip the Throwing Daggers. When you start out in the pit, run as far from him as possible. Throw daggers at him until he is almost close enough to hit you, then Devil Trigger and run under him to the other side of the pit. Repeat this strategy. Note: Your Devil Trigger should charge up just enough. If you defeat the second form quickly and you do this trick on the third form correctly, you should be able to get an "S" rank for time, and high ranking for damage, although style will probably get a "D" rank.