Numeroth is a gaunt, thin man especially when compared to his twin. Though less than half the weight of Argus, the similarities are definitely noticeable.
The younger, smaller twin of the Rigorfield heirs, he is (literally and figuratively) in the shadow of his brother. His father seems to strongly favor Argus as an heir to House Rigorfield for reasons unknown. He also has a wife, Juniper, with whom he has twin twelve year old daughters.