Marius and Silvia are Snivy siblings of unknown origin, having only very recently popped up out of the blue. Born with dicephaly, the twins share one body and often clumsily fight over its control, but always seem to reach a compromise in the end of their bouts. When they put their minds together, they become a force to be reckoned with, although due to their broad differences and intense sibling rivalry, this happens rarely.
They prefer to stray from the beaten path and devote their time exploring uncharted lands. While Silvia is extensively obedient, Marius is decidedly obstinate and answers to no one. For this reason, they often travel by themselves.