Trenton in his hollow form. His left arm is made from a black shadow, and can turn and morph into anything he wishes, as long as it doesn't detach from his body. While his right arm is made of bone from his human body, since the hollow was born without a right arm, it stole its right arm from its dead body, which is being attached to it by part of the left arm.

Hollow, as in Bleach incase a few of you are wondering ^////^