Runemaster

The Runemaster (ルーンマスター) is an Emblem Heartless introduced in Kingdom Hearts II Final Mix.

Design
A Runemaster is a rather small Heartless that wears long robes that cover its feet. It also wears a tall, cylindrical, black and grey hat with a white brim and what seem to be black gloves. The only part of the Heartless no covered by clothing is its face, which somewhat resembles that of a Shadow, sporting the same black, spherical head and yellow, glowing eyes. All Runemasters hold a book known as the Akashic Record+.

The Runemaster’s name holds a similar meaning to that of the Bookmaster, and references magical runes.

Strategy
It is unable to take damage from the front and will be blocked by the book. Since it is also immune to magic like the Bookmaster, the only way to defeat it is by attacking from behind.

Trivia

 * If the Heartless emblem is on the book's front cover, then the Runemaster is reading the book in Japanese style, from right to left, like the Bookmaster.