Jin

Jin is currently The Guardian of the Sea of Souls, a being of ultimate power with access to pretty much anything and everything.

He is a completely neutral being, Jin will only intervene if there is a threat to all of existence the Sea of Souls.

As The Guardian, Jin receives power from the Sea of Souls and has access to all abilities and maxed out Soul manipulation.

The World Ends With You
Jin appeared at the start and assassinated Tael Lightwing and Hana Song to include them in the Reaper's Game and try and put a stop to The Composer.