Zero
Zero is a duplicate of Lockley created from his shadow.
For a while after his accidental creation he spent the majority of his time antagonising Lockley. He has since settled down and commonly associates with Seran, a resident of Atheria.
Numbered Abilities
Zero is a powerful being and is capable of unleashing powerful techniques. All of these have seemingly unrelated numbers attached to them. This is due to Zero's method of creating new abilities, in which he will imagine a technique, name it, then attempt to perform it. When he can perform the technique to his expectations, it is numbered according to the number of attempts taken.
The majority of his earlier techniques, thusly, have numbers in the hundreds, due to his inexperience.