Moss

Moss (モス) is a Grand Duke in the Daemon Realm and one of Testarossa's subordinates. He has stood undefeated for tens of thousand of years, with his strength second only to the Primordials. Along with Cien, he serves as one of Testarossa’s lieutenants.

Concealed Form
He assumes the appearance of an adorable young boy who, according to Rimuru, looks like an elementary school student in 5th or 6th grade. He has ash-grey hair. From appearances alone he doesn't come off as intimidating at all, even though he's a super old daemon who's lived several millennia.

True Form
After gathering all of his Body Doubles, Moss becomes a beautiful man with silver hair and blue eyes.

Personality
He usually holds a calm and levelheaded disposition in contrast with his appearance, and is fairly intelligent. In the presence of his superiors, Moss gets super timid, to the point his own presence in the room thins out. He is very loyal—attending to Testarossa for several millennia in spite of her personality is proof of that—and he shows extreme humbleness whenever praised. He's quick to rage when his master is insulted in any manner and will proceed to ruthlessly kill the offender unless it goes against his orders.

Background
A Daemon of the pre-historic species and a high ranking figure of the ruling class in the Daemon world; he is a subordinate of Blanc. In the past, he often dueled Veyron numerous times and always emerged victorious, cursing the latter to a fate of repeated reincarnations.

Trivia

 * Named after the, a limited edition of the Mercedes-Benz SLR McLaren, which is in turn refurbishing of the 50s' Mercedes-Benz 300 SLR.