Typical of those in his primary faction, Matthias presents as deeply devout to those on his side and brutal to those not. He is shown to feature an intense excitement at the possibility of reuniting with Ryōshū, who he called "buddy" in her youth. He features a toy-loving attitude, which contributes to a short attention span likened to his destruction of new toys, as well as a tendency to buy and collect things he has no intention to actually use. Despite this somewhat immature personality, he remains highly capable in combat, able to fend off a variety of opponents at a time, with a litany of specific tools that assist his battles. Even with his boisterous personality, Matthias is a brutal and dedicated man who understands the goal of his side, never wavering when it is threatened or questioned.
Speaks in measured, compliance-heavy phrases; softens sentences with careful, humane asides.
