Sid is a lesser demon who first appears in episode one, and has recurring appearances throughout the Devil May Cry: The Animated Series. Initially seeming to be an insignificant danger and minor nuisance, Dante shows mercy towards Sid and refrains from killing him when given the opportunity. Unfortunately, Sid's ambitions proved to be far more dangerous than Dante possibly imagined, this makes Sid the central antagonist of the anime. He later gained the powers of Abigail, a powerful demon that once fought with the Devil King, but is defeated and slain by Dante.
Sid was a lesser demon with little power. His strength, speed and agility were somewhat higher than that of humans, though not much. He could condense his body and change his vocal pattern in order to disguise himself within a human's flesh as he is incapable of assuming human form. His overall abilities are so low that even Nina Lowell's amulet which detects all demons within a certain radius does not react to him at all besides burning his skin upon physical contact.
After being infused with Abigail's magic, his powers are greatly increased to the point where he could assume Abigail's form, shoot beams of demonic energy from his mouth, possess vast physical strength enough to overpower a non-Devil Triggered Dante, summon and control lesser demons, and withstand great damage without ill effects. He could also manipulate his physical composition, allowing him to create spikes and blades from his body. He could also make these spikes erupt from the ground to impale Dante. His new power allowed him to regenerate as a giant from his own blood even after being shot to bits.