Matthias

, born under the name of Samuel Jameson, is the Imperialite apprentice to Zwarst Andreas and a member of the Imperial Consulate. He's a member of the Avangard with the designation: R- "The Rock"

Powers and Abilities
Cement Manipulation:

Gladius
Sangaku (山岳; Japanese, Mountain): Sangaku's sealed state takes the form of a spadroon with a black hilt and gold guard which extends to the base, resembling the kanji for Sangaku (山).
 * Gyōretsu: Matthias releases his Gladius with the command, "Stand Tall", refering to a mountains height. To release his Gladius, he plunges his sword into the ground and encases the sword in cement. After speaking the release command, his gladius then envelopes him in a large cocoon of concrete, concealing his transformation into a gigantic, bulky and muscular humanoid, going as high as 18 ft. with cement spike-like protrusions on his shoulders and spine. As the transformation finishes, Matthias emerges from the cocoon dramatically and fuses the debris with his hands and feet, gaining claws on his hands and turning his feet into talons. In this form, Matthias' voice deepens and gains a haunting and frightening echo, his skin is now so pale the color appears to be light gray, his eyes also change color: his sclera is now dark slate gray and his irises are bright gold with red lining.

Trivia

 * Matthias is the first Tenebrae Acolyte and the first identified Rodian shown.